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Book ; Online: The Resistive-Plate WELL with Argon mixtures - a robust gaseous radiation detector

Moleri, L. / Amaro, F. D. / Arazi, L. / Azevedo, C. D. R. / Oliveri, E. / Pitt, M. / Schaarschmidt, J. / Shaked-Renous, D. / Santos, J. M. F. dos / Veloso, J. F. C. A. / Breskin, A. / Bressler, S.

2016

Abstract: A thin single-element THGEM-based, Resistive-Plate WELL (RPWELL) detector was operated with 150 GeV/c muon and pion beams in Ne/(5%CH$_4$), Ar/(5%CH$_4$) and Ar/(7%CO$_2$); signals were recorded with 1 cm$^2$ square pads and SRS/APV25 electronics. ... ...

Abstract	A thin single-element THGEM-based, Resistive-Plate WELL (RPWELL) detector was operated with 150 GeV/c muon and pion beams in Ne/(5%CH$_4$), Ar/(5%CH$_4$) and Ar/(7%CO$_2$); signals were recorded with 1 cm$^2$ square pads and SRS/APV25 electronics. Detection efficiency values greater than 98% were reached in all the gas mixtures, at average pad multiplicity of 1.2. The use of the 10$^9${\Omega}cm resistive plate resulted in a completely discharge-free operation also in intense pion beams. The efficiency remained essentially constant at 98-99% up to fluxes of $\sim$10$^4$Hz/cm$^2$, dropping by a few % when approaching 10$^5$ Hz/cm$^2$. These results pave the way towards cost-effective, robust, efficient, large-scale detectors for a variety of applications in future particle, astro-particle and applied fields. A potential target application is digital hadron calorimetry. Comment: presented at the 2016 VIenna Conf. On instrumentation. Submitted to the Conference proceedings
Keywords	Physics - Instrumentation and Detectors ; High Energy Physics - Experiment
Subject code	621
Publishing date	2016-03-15
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Book ; Online: Micromegas operation in high pressure xenon

Balan, C. / Freitas, E. D. C. / Papaevangelou, T. / Giomataris, I. / da Luz, H. Natal / Monteiro, C. M. B. / Santos, J. M. F. dos

charge and scintillation readout

2010

Abstract: The operational characteristics of a Micromegas operating in pure xenon at the pressure range of 1 to 10 bar are investigated. The maximum charge gain achieved in each pressure is approximately constant, around 4x10^2, for xenon pressures up to 5 bar and ...

Abstract	The operational characteristics of a Micromegas operating in pure xenon at the pressure range of 1 to 10 bar are investigated. The maximum charge gain achieved in each pressure is approximately constant, around 4x10^2, for xenon pressures up to 5 bar and decreasing slowly above this pressure down to values somewhat above 10^2 at 10 bar. The MM presents the highest gains for xenon pressures above 4 bar, when compared to other micropattern gaseous multipliers. The lowest energy resolution obtained for X-rays of 22.1 keV exhibits a steady increase with pressure, from 12% at 1bar to about 32% at 10 bar. The effective scintillation yield, defined as the number of photons exiting through the MM mesh holes per primary electron produced in the conversion region was calculated. This yield is about 2x10^2 photons per primary electron at 1 bar, increasing to about 6x10^2 at 5 bar and, then, decreasing again to 2x10^2 at 10 bar. The readout of this scintillation by a suitable photosensor will result in higher gains but with increased statistical fluctuations. Comment: 22 pages, 11 figures
Keywords	Physics - Instrumentation and Detectors ; High Energy Physics - Phenomenology
Subject code	660
Publishing date	2010-09-15
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Book ; Online: Primary and secondary scintillation measurements in a xenon Gas Proportional Scintillation Counter

Fernandes, L. M. P. / Freitas, E. D. C. / Ball, M. / Gómez-Cadenas, J. J. / Monteiro, C. M. B. / Yahlali, N. / Nygren, D. / Santos, J. M. F. dos

2010

Abstract: NEXT is a new experiment to search for neutrinoless double beta decay using a 100 kg radio-pure high-pressure gaseous xenon TPC. The detector requires excellent energy resolution, which can be achieved in a Xe TPC with electroluminescence readout. ... ...

Abstract	NEXT is a new experiment to search for neutrinoless double beta decay using a 100 kg radio-pure high-pressure gaseous xenon TPC. The detector requires excellent energy resolution, which can be achieved in a Xe TPC with electroluminescence readout. Hamamatsu R8520-06SEL photomultipliers are good candidates for the scintillation readout. The performance of this photomultiplier, used as VUV photosensor in a gas proportional scintillation counter, was investigated. Initial results for the detection of primary and secondary scintillation produced as a result of the interaction of 5.9 keV X-rays in gaseous xenon, at room temperature and at pressures up to 3 bar, are presented. An energy resolution of 8.0% was obtained for secondary scintillation produced by 5.9 keV X-rays. No significant variation of the primary scintillation was observed for different pressures (1, 2 and 3 bar) and for electric fields up to 0.8 V cm-1 torr-1 in the drift region, demonstrating negligible recombination luminescence. A primary scintillation yield of 81 \pm 7 photons was obtained for 5.9 keV X-rays, corresponding to a mean energy of 72 \pm 6 eV to produce a primary scintillation photon in xenon. Comment: 16 pages, 10 figures, accepted for publication in JINST
Keywords	Astrophysics - Instrumentation and Methods for Astrophysics ; Nuclear Experiment
Subject code	660
Publishing date	2010-09-14
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: [No title information]

Aprile, E / Aalbers, J / Agostini, F / Alfonsi, M / Althueser, L / Amaro, F D / Antochi, V C / Angelino, E / Angevaare, J R / Arneodo, F / Barge, D / Baudis, L / Bauermeister, B / Bellagamba, L / Benabderrahmane, M L / Berger, T / Breur, P A / Brown, A / Brown, E /

Bruenner, S / Bruno, G / Budnik, R / Capelli, C / Cardoso, J M R / Cichon, D / Cimmino, B / Clark, M / Coderre, D / Colijn, A P / Conrad, J / Cussonneau, J P / Decowski, M P / Depoian, A / Di Gangi, P / Di Giovanni, A / Di Stefano, R / Diglio, S / Elykov, A / Eurin, G / Ferella, A D / Fulgione, W / Gaemers, P / Gaior, R / Rosso, A Gallo / Galloway, M / Gao, F / Grandi, L / Garbini, M / Hasterok, C / Hils, C / Hiraide, K / Hoetzsch, L / Hogenbirk, E / Howlett, J / Iacovacci, M / Itow, Y / Joerg, F / Kato, N / Kazama, S / Kobayashi, M / Koltman, G / Kopec, A / Landsman, H / Lang, R F / Levinson, L / Lin, Q / Lindemann, S / Lindner, M / Lombardi, F / Lopes, J A M / López Fune, E / Macolino, C / Mahlstedt, J / Manenti, L / Manfredini, A / Marignetti, F / Undagoitia, T Marrodán / Martens, K / Masbou, J / Masson, D / Mastroianni, S / Messina, M / Miuchi, K / Molinario, A / Morå, K / Moriyama, S / Mosbacher, Y / Murra, M / Naganoma, J / Ni, K / Oberlack, U / Odgers, K / Palacio, J / Pelssers, B / Peres, R / Pienaar, J / Pizzella, V / Plante, G / Qin, J / Qiu, H / García, D Ramírez / Reichard, S / Rocchetti, A / Rupp, N / Santos, J M F Dos / Sartorelli, G / Šarčević, N / Scheibelhut, M / Schindler, S / Schreiner, J / Schulte, D / Schumann, M / Lavina, L Scotto / Selvi, M / Semeria, F / Shagin, P / Shockley, E / Silva, M / Simgen, H / Takeda, A / Therreau, C / Thers, D / Toschi, F / Trinchero, G / Tunnell, C / Vargas, M / Volta, G / Wack, O / Wang, H / Wei, Y / Weinheimer, C / Weiss, M / Wenz, D / Westermann, J / Wittweg, C / Wulf, J / Xu, Z / Yamashita, M / Ye, J / Zavattini, G / Zhang, Y / Zhu, T / Zopounidis, J P

The European physical journal. C, Particles and fields

2021 Volume 81, Issue 4, Page(s) 337

Abstract: The selection of low-radioactive construction materials is of utmost importance for the success of low-energy rare event search experiments. Besides radioactive contaminants in the bulk, the emanation of radioactive radon atoms from material surfaces ... ...

Abstract	The selection of low-radioactive construction materials is of utmost importance for the success of low-energy rare event search experiments. Besides radioactive contaminants in the bulk, the emanation of radioactive radon atoms from material surfaces attains increasing relevance in the effort to further reduce the background of such experiments. In this work, we present the
Language	English
Publishing date	2021-04-20
Publishing country	France
Document type	Journal Article
ZDB-ID	1459069-4
ISSN	1434-6052 ; 1434-6044
ISSN (online)	1434-6052
ISSN	1434-6044
DOI	10.1140/epjc/s10052-020-08777-z
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Book ; Online: Sensitivity of the NEXT experiment to Xe-124 double electron capture

Martínez-Lema, G. / Martínez-Vara, M. / Sorel, M. / Adams, C. / Alvarez, V. / Arazi, L. / Arnquist, I. J. / Azevedo, C. D. R / Bailey, K. / Ballester, F. / Benlloch-Rodríguez, J. M. / Borges, F. I. G. M. / Byrnes, N. / Cárcel, S. / Carrión, J. V. / Cebrián, S. / Church, E. / Conde, C. A. N. / Contreras, T. /

Díaz, G. / Díaz, J. / Diesburg, M. / Escada, J. / Esteve, R. / Felkai, R. / Fernandes, A. F. M. / Fernandes, L. M. P. / Ferrario, P. / Ferreira, A. L. / Freitas, E. D. C. / Generowicz, J. / Ghosh, S. / Goldschmidt, A. / Gómez-Cadenas, J. J. / González-Díaz, D. / Guenette, R. / Gutiérrez, R. M. / Haefner, J. / Hafidi, K. / Hauptman, J. / Henriques, C. A. O. / Morata, J. A. Hernando / Herrero, P. / Herrero, V. / Ifergan, Y. / Johnston, S. / Jones, B. J. P. / Kekic, M. / Labarga, L. / Laing, A. / Lebrun, P. / López-March, N. / Losada, M. / Mano, R. D. P. / Martín-Albo, J. / Martínez, A. / McDonald, A. D. / Monrabal, F. / Monteiro, C. M. B. / Mora, F. J. / Vidal, J. Muñoz / Novella, P. / Nygren, D. R. / Palmeiro, B. / Para, A. / Pérez, J. / Querol, M. / Redwine, A. B. / Renner, J. / Repond, J. / Riordan, S. / Ripoll, L. / García, Y. Rodríguez / Rodríguez, J. / Rogers, L. / Romeo, B. / Romo-Luque, C. / Santos, F. P. / Santos, J. M. F. dos / Simón, A. / Sofka, C. / Stiegler, T. / Toledo, J. F. / Torrent, J. / Usón, A. / Veloso, J. F. C. A. / Webb, R. / Weiss-Babai, R. / White, J. T. / Woodruff, K. / Yahlali, N.

2020

Abstract: Double electron capture by proton-rich nuclei is a second-order nuclear process analogous to double beta decay. Despite their similarities, the decay signature is quite different, potentially providing a new channel to measure the hypothesized ... ...

Abstract	Double electron capture by proton-rich nuclei is a second-order nuclear process analogous to double beta decay. Despite their similarities, the decay signature is quite different, potentially providing a new channel to measure the hypothesized neutrinoless mode of these decays. The Standard-Model-allowed two-neutrino double electron capture ($2\nu ECEC$) has been predicted for a number of isotopes, but only observed in $^{78}$Kr, $^{130}$Ba and, recently, $^{124}$Xe. The sensitivity to this decay establishes a benchmark for the ultimate experimental goal, namely the potential to discover also the lepton-number-violating neutrinoless version of this process, $0\nu ECEC$. Here we report on the current sensitivity of the NEXT-White detector to $^{124}$Xe $2\nu ECEC$ and on the extrapolation to NEXT-100. Using simulated data for the $2\nu ECEC$ signal and real data from NEXT-White operated with $^{124}$Xe-depleted gas as background, we define an optimal event selection that maximizes the NEXT-White sensitivity. We estimate that, for NEXT-100 operated with xenon gas isotopically enriched with 1 kg of $^{124}$Xe and for a 5-year run, a sensitivity to the $2\nu ECEC$ half-life of $6 \times 10^{22}$ y (at 90% confidence level) or better can be reached. Comment: 23 pages, 13 figures
Keywords	High Energy Physics - Experiment ; Nuclear Experiment ; Physics - Instrumentation and Detectors
Subject code	621
Publishing date	2020-06-12
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Book ; Online: Mitigation of Backgrounds from Cosmogenic $^{137}$Xe in Xenon Gas Experiments using $^{3}$He Neutron Capture

Rogers, L. / Jones, B. J. P. / Laing, A. / Pingulkar, S. / Woodruff, K. / Adams, C. / Álvarez, V. / Arazi, L. / Arnquist, I. J. / Azevedo, C. D. R / Bailey, K. / Ballester, F. / Benlloch-Rodríguez, J. M. / Borges, F. I. G. M. / Byrnes, N. / Cárcel, S. / Carrión, J. V. / Cebrián, S. / Church, E. /

Conde, C. A. N. / Contreras, T. / Díaz, G. / Díaz, J. / Diesburg, M. / Dingler, R. / Escada, J. / Esteve, R. / Felkai, R. / Fernandes, A. F. M. / Fernandes, L. M. P. / Ferrario, P. / Ferreira, A. L. / Freitas, E. D. C. / Generowicz, J. / Ghosh, S. / Goldschmidt, A. / Gómez-Cadenas, J. J. / González-Díaz, D. / Guenette, R. / Gutiérrez, R. M. / Haefner, J. / Hafidi, K. / Hauptman, J. / Henriques, C. A. O. / Morata, J. A. Hernando / Herrero, P. / Herrero, V. / Ifergan, Y. / Johnston, S. / Kekic, M. / Labarga, L. / Lebrun, P. / López-March, N. / Losada, M. / Mano, R. D. P. / Martín-Albo, J. / Martínez, A. / Martínez-Lema, G. / McDonald, A. D. / Monrabal, F. / Monteiro, C. M. B. / Mora, F. J. / Vidal, J. Muñoz / Novella, P. / Nygren, D. R. / Palmeiro, B. / Para, A. / Pérez, J. / Querol, M. / Redwine, A. B. / Renner, J. / Repond, J. / Riordan, S. / Ripoll, L. / García, Y. Rodríguez / Rodríguez, J. / Romeo, B. / Romo-Luque, C. / Santos, F. P. / Santos, J. M. F. dos / Simón, A. / Sofka, C. / Sorel, M. / Stiegler, T. / Toledo, J. F. / Torrent, J. / Usón, A. / Veloso, J. F. C. A. / Webb, R. / Weiss-Babai, R. / White, J. T. / Yahlali, N.

2020

Abstract: Xe{136} is used as the target medium for many experiments searching for \bbnonu. Despite underground operation, cosmic muons that reach the laboratory can produce spallation neutrons causing activation of detector materials. A potential background that ... ...

Abstract	\Xe{136} is used as the target medium for many experiments searching for \bbnonu. Despite underground operation, cosmic muons that reach the laboratory can produce spallation neutrons causing activation of detector materials. A potential background that is difficult to veto using muon tagging comes in the form of \Xe{137} created by the capture of neutrons on \Xe{136}. This isotope decays via beta decay with a half-life of 3.8 minutes and a \Qb\ of $\sim$4.16 MeV. This work proposes and explores the concept of adding a small percentage of \He{3} to xenon as a means to capture thermal neutrons and reduce the number of activations in the detector volume. When using this technique we find the contamination from \Xe{137} activation can be reduced to negligible levels in tonne and multi-tonne scale high pressure gas xenon neutrinoless double beta decay experiments running at any depth in an underground laboratory.
Keywords	Physics - Instrumentation and Detectors ; High Energy Physics - Experiment
Subject code	660
Publishing date	2020-01-29
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Book ; Online: Radio Frequency and DC High Voltage Breakdown of High Pressure Helium, Argon, and Xenon

Woodruff, K. / Baeza-Rubio, J. / Huerta, D. / Jones, B. J. P. / McDonald, A. D. / Norman, L. / Nygren, D. R. / Adams, C. / Álvarez, V. / Arazi, L. / Arnquist, I. J. / Azevedo, C. D. R / Bailey, K. / Ballester, F. / Benlloch-Rodríguez, J. M. / Borges, F. I. G. M. / Byrnes, N. K. / Cárcel, S. / Carrión, J. V. /

Cebrián, S. / Church, E. / Conde, C. A. N. / Contreras, T. / Denisenko, A. A. / Díaz, G. / Díaz, J. / Diesburg, M. / Escada, J. / Esteve, R. / Felkai, R. / Fernandes, A. F. M. / Fernandes, L. M. P. / Ferrario, P. / Ferreira, A. L. / Foss Jr., F. W. / Freitas, E. D. C. / Generowicz, J. / Goldschmidt, A. / González-Díaz, D. / Gómez-Cadenas, J. J. / Ghosh, S. / Guenette, R. / Gutiérrez, R. M. / Haefner, J. / Hafidi, K. / Hauptman, J. / Henriques, C. A. O. / Morata, J. A. Hernando / Herrero, P. / Herrero, V. / Johnston, S. / Kekic, M. / Labarga, L. / Laing, A. / Lebrun, P. / López-March, N. / Losada, M. / Mano, R. D. P. / Martín-Albo, J. / Martínez, A. / Martínez-Lema, G. / Monrabal, F. / Monteiro, C. M. B. / Mora, F. J. / Vidal, J. Muñoz / Novella, P. / Palmeiro, B. / Para, A. / Pérez, J. / Querol, M. / Renner, J. / Repond, J. / Riordan, S. / Ripoll, L. / Garcia, Y. Rodriguez / Rodríguez, J. / Rogers, L. / Romeo, B. / Romo-Luque, C. / Santos, F. P. / Santos, J. M. F. dos / Simón, A. / Sofka, C. / Sorel, M. / Stiegler, T. / Thapa, P. / Toledo, J. F. / Torrent, J. / Usón, A. / Veloso, J. F. C. A. / Webb, R. / Weiss-Babai, R. / White, J. T. / Yahlali, N.

2019

Abstract: Motivated by the possibility of guiding daughter ions from double beta decay events to single-ion sensors for barium tagging, the NEXT collaboration is developing a program of R&D to test radio frequency (RF) carpets for ion transport in high pressure ... ...

Abstract	Motivated by the possibility of guiding daughter ions from double beta decay events to single-ion sensors for barium tagging, the NEXT collaboration is developing a program of R&D to test radio frequency (RF) carpets for ion transport in high pressure xenon gas. This would require carpet functionality in regimes at higher pressures than have been previously reported, implying correspondingly larger electrode voltages than in existing systems. This mode of operation appears plausible for contemporary RF-carpet geometries due to the higher predicted breakdown strength of high pressure xenon relative to low pressure helium, the working medium in most existing RF carpet devices. In this paper we present the first measurements of the high voltage dielectric strength of xenon gas at high pressure and at the relevant RF frequencies for ion transport (in the 10 MHz range), as well as new DC and RF measurements of the dielectric strengths of high pressure argon and helium gases at small gap sizes. We find breakdown voltages that are compatible with stable RF carpet operation given the gas, pressure, voltage, materials and geometry of interest.
Keywords	Physics - Instrumentation and Detectors ; Nuclear Experiment
Subject code	621
Publishing date	2019-09-12
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Book ; Online: $^{222}$Rn emanation measurements for the XENON1T experiment

Aprile, E. / Aalbers, J. / Agostini, F. / Alfonsi, M. / Althueser, L. / Amaro, F. D. / Antochi, V. C. / Angelino, E. / Angevaare, J. R. / Arneodo, F. / Barge, D. / Baudis, L. / Bauermeister, B. / Bellagamba, L. / Benabderrahmane, M. L. / Berger, T. / Breur, P. A. / Brown, A. / Brown, E. /

Bruenner, S. / Bruno, G. / Budnik, R. / Capelli, C. / Cardoso, J. M. R. / Cichon, D. / Cimmino, B. / Clark, M. / Coderre, D. / Colijn, A. P. / Conrad, J. / Cussonneau, J. P. / Decowski, M. P. / Depoian, A. / Di Gangi, P. / Di Giovanni, A. / Di Stefano, R. / Diglio, S. / Elykov, A. / Eurin, G. / Ferella, A. D. / Fulgione, W. / Gaemers, P. / Gaior, R. / Rosso, A. Gallo / Galloway, M. / Gao, F. / Grandi, L. / Garbini, M. / Hasterok, C. / Hils, C. / Hiraide, K. / Hoetzsch, L. / Hogenbirk, E. / Howlett, J. / Iacovacci, M. / Itow, Y. / Joerg, F. / Kato, N. / Kazama, S. / Kobayashi, M. / Koltman, G. / Kopec, A. / Landsman, H. / Lang, R. F. / Levinson, L. / Lin, Q. / Lindemann, S. / Lindner, M. / Lombardi, F. / Lopes, J. A. M. / Fune, E. López / Macolino, C. / Mahlstedt, J. / Manenti, L. / Manfredini, A. / Marignetti, F. / Undagoitia, T. Marrodán / Martens, K. / Masbou, J. / Masson, D. / Mastroianni, S. / Messina, M. / Miuchi, K. / Molinario, A. / Morå, K. / Moriyama, S. / Mosbacher, Y. / Murra, M. / Naganoma, J. / Ni, K. / Oberlack, U. / Odgers, K. / Palacio, J. / Pelssers, B. / Peres, R. / Pienaar, J. / Pizzella, V. / Plante, G. / Qin, J. / Qiu, H. / García, D. Ramírez / Reichard, S. / Rocchetti, A. / Rupp, N. / Santos, J. M. F. dos / Sartorelli, G. / Šarčević, N. / Scheibelhut, M. / Schindler, S. / Schreiner, J. / Schulte, D. / Schumann, M. / Lavina, L. Scotto / Selvi, M. / Semeria, F. / Shagin, P. / Shockley, E. / Silva, M. / Simgen, H. / Takeda, A. / Therreau, C. / Thers, D. / Toschi, F. / Trinchero, G. / Tunnell, C. / Vargas, M. / Volta, G. / Wack, O. / Wang, H. / Wei, Y. / Weinheimer, C. / Weiss, M. / Wenz, D. / Westermann, J. / Wittweg, C. / Wulf, J. / Xu, Z. / Yamashita, M. / Ye, J. / Zavattini, G. / Zhang, Y. / Zhu, T. / Zopounidis, J. P.

2020

Abstract	The selection of low-radioactive construction materials is of utmost importance for the success of low-energy rare event search experiments. Besides radioactive contaminants in the bulk, the emanation of radioactive radon atoms from material surfaces attains increasing relevance in the effort to further reduce the background of such experiments. In this work, we present the $^{222}$Rn emanation measurements performed for the XENON1T dark matter experiment. Together with the bulk impurity screening campaign, the results enabled us to select the radio-purest construction materials, targeting a $^{222}$Rn activity concentration of 10 $\mu$Bq/kg in 3.2 t of xenon. The knowledge of the distribution of the $^{222}$Rn sources allowed us to selectively eliminate critical components in the course of the experiment. The predictions from the emanation measurements were compared to data of the $^{222}$Rn activity concentration in XENON1T. The final $^{222}$Rn activity concentration of (4.5 $\pm$ 0.1) $\mu$Bq/kg in the target of XENON1T is the lowest ever achieved in a xenon dark matter experiment. Comment: 14 pages, 3 figures
Keywords	Physics - Instrumentation and Detectors ; High Energy Physics - Experiment
Subject code	660
Publishing date	2020-09-29
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Book ; Online: Characterization of a medium size Xe/TMA TPC instrumented with microbulk Micromegas, using low-energy $\gamma$-rays

The NEXT collaboration / Alvarez, V. / Borges, F. I. G. M. / Carcel, S. / Castel, J. / Cebrian, S. / Cervera, A. / Conde, C. A. N. / Dafni, T. / Dias, T. H. V. T. / Diaz, J. / Egorov, M. / Esteve, R. / Evtoukhovitch, P. / Fernandes, L. M. P. / Ferrario, P. / Ferreira, A. L. / Freitas, E. D. C. / Gehman, V. M. /

Gil, A. / Goldschmidt, A. / Gomez, H. / Gomez-Cadenas, J. J. / Gonzalez-Diaz, D. / Gutierrez, R. M. / Hauptman, J. / Morata, J. A. Hernando / Herrera, D. C. / Iguaz, F. J. / Irastorza, I. G. / Jinete, M. A. / Labarga, L. / Laing, A. / Liubarsky, I. / Lopes, J. A. M. / Lorca, D. / Losada, M. / Luzon, G. / Mari, A. / Martin-Albo, J. / Martinez, A. / Martinez-Lema, G. / Miller, T. / Moiseenko, A. / Monrabal, F. / Monteiro, C. M. B. / Mora, F. J. / Moutinho, L. M. / Vidal, J. Munoz / da Luz, H. Natal / Navarro, G. / Nebot-Guinot, M. / Nygren, D. / Oliveira, C. A. B. / Palma, R. / Perez, J. / Aparicio, J. L. Perez / Renner, J. / Ripoll, L. / Rodriguez, A. / Rodriguez, J. / Santos, F. P. / Santos, J. M. F. dos / Segui, L. / Serra, L. / Shuman, D. / Simon, A. / Sofka, C. / Sorel, M. / Toledo, J. F. / Tomas, A. / Torrent, J. / Tsamalaidze, Z. / Vazquez, D. / Veloso, J. F. C. A. / Villar, J. A. / Webb, R. C. / White, J. T. / Yahlali, N. / Aznar, F. / Calvet, D. / Druillole, F. / Ferrer-Ribas, E. / Garcia, J. A. / Giomataris, I. / Gracia, J. / Coguie, A. Le / Mols, J. P. / Pons, P. / Ruiz, E.

2013

Abstract: NEXT-MM is a general-purpose high pressure (10 bar, $\sim25$ l active volume) Xenon-based TPC, read out in charge mode with an 8 cm $\times$8 cm-segmented 700 cm$^2$ plane (1152 ch) of the latest microbulk-Micromegas technology. It has been recently ... ...

Abstract	NEXT-MM is a general-purpose high pressure (10 bar, $\sim25$ l active volume) Xenon-based TPC, read out in charge mode with an 8 cm $\times$8 cm-segmented 700 cm$^2$ plane (1152 ch) of the latest microbulk-Micromegas technology. It has been recently commissioned at University of Zaragoza as part of the R&D of the NEXT $0\nu\beta\beta$ experiment, although the experiment's first stage is currently being built based on a SiPM/PMT-readout concept relying on electroluminescence. Around 2 million events were collected during the last months, stemming from the low energy $\gamma$-rays emitted by a $^{241}$Am source when interacting with the Xenon gas ($\epsilon$ = 26, 30, 59.5 keV). The localized nature of such events above atmospheric pressure, the long drift times, as well as the possibility to determine their production time from the associated $\alpha$ particle in coincidence, allow the extraction of primordial properties of the TPC filling gas, namely the drift velocity, diffusion and attachment coefficients. In this work we focus on the little explored combination of Xe and trimethylamine (TMA) for which, in particular, such properties are largely unknown. This gas mixture offers potential advantages over pure Xenon when aimed at Rare Event Searches, mainly due to its Penning characteristics, wave-length shifting properties and reduced diffusion, and it is being actively investigated by our collaboration. The chamber is currently operated at 2.7 bar, as an intermediate step towards the envisaged 10 bar. We report here its performance as well as a first implementation of the calibration procedures that have allowed the extension of the previously reported energy resolution to the whole readout plane (10.6%FWHM@30keV). Comment: 22 pages, 13 figures
Keywords	Physics - Instrumentation and Detectors
Subject code	660
Publishing date	2013-11-14
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Book ; Online: In-situ calibration of a PMT inside a scintillation detector by means of primary scintillation detection

NEXT Collaboration / Álvarez, V. / Borges, F. I. G. M. / Cárcel, S. / Castel, J. / Cebrián, S. / Cervera, A. / Conde, C. A. N. / Dafni, T. / Dias, T. H. V. T. / Díaz, J. / Egorov, M. / Esteve, R. / Evtoukhovitch, P. / Fernandes, L. M. P. / Ferrario, P. / Ferreira, A. L. / Freitas, E. D. C. / Gehman, V. M. /

Gil, A. / Goldschmidt, A. / Gómez, H. / Gómez-Cadenas, J. J. / González-Díaz, D. / Gutiérrez, R. M. / Hauptman, J. / Morata, J. A. Hernando / Herrera, D. C. / Iguaz, F. J. / Irastorza, I. G. / Jinete, M. A. / Labarga, L. / Laing, A. / Liubarsky, I. / Lopes, J. A. M. / Lorca, D. / Losada, M. / Luzón, G. / Marí, A. / Martín-Albo, J. / Martínez, A. / Miller, T. / Moiseenko, A. / Monrabal, F. / Monteiro, C. M. B. / Mora, F. J. / Moutinho, L. M. / Vidal, J. Muñoz / da Luz, H. Natal / Navarro, G. / Nebot, M. / Nygren, D. / Oliveira, C. A. B. / Palma, R. / Pérez, J. / Aparicio, J. L. Pérez / Renner, J. / Ripoll, L. / Rodríguez, A. / Rodríguez, J. / Santos, F. P. / Santos, J. M. F. dos / Segui, L. / Serra, L. / Shuman, D. / Simón, A. / Sofka, C. / Sorel, M. / Toledo, J. F. / Tomás, A. / Torrent, J. / Tsamalaidze, Z. / Vázquez, D. / Veloso, J. F. C. A. / Villar, J. A. / Webb, R. C. / White, J. T / Yahlali, N.

2012

Abstract: We have investigated the possibility of calibrating the PMTs of scintillation detectors, using the primary scintillation produced by X-rays to induce single photoelectron response of the PMT. The high-energy tail of this response, can be approximated to ... ...

Abstract	We have investigated the possibility of calibrating the PMTs of scintillation detectors, using the primary scintillation produced by X-rays to induce single photoelectron response of the PMT. The high-energy tail of this response, can be approximated to an exponential function, under some conditions. In these cases, it is possible to determine the average gain for each PMT biasing voltage from the inverse of the exponent of the exponential fit to the tail, which can be done even if the background and/or noise cover-up most of the distribution. We have compared our results with those obtained by the commonly used single electron response (SER) method, which uses a LED to induce a single photoelectron response of the PMT and determines the peak position of such response, relative to the pedestal peak (the electronic noise peak, which corresponds to 0 photoelectrons). The results of the exponential fit method agree with those obtained by the SER method when the average number of photoelectrons reaching the first dynode per light/scintillation pulse is around 1.0. The SER method has higher precision, while the exponential fit method has the advantage of being useful in situations where the PMT is already in situ, being difficult or even impossible to apply the SER method, e.g. in sealed scintillator/PMT devices. Comment: 11 pages, 8 figures
Keywords	Physics - Instrumentation and Detectors ; High Energy Physics - Experiment
Subject code	621
Publishing date	2012-11-19
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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