LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 4 of total 4

Search options

  1. Book ; Online: Composite macro-bolometers for the rejection of surface radioactive background in rare-event experiments

    Foggetta, Luca / Giuliani, Andrea / Nones, Claudia / Pedretti, Marisa / Salvioni, Chiara / Sangiorgio, Samuele

    2011  

    Abstract: Experiments searching for rare events, such as neutrinoless double beta decay and interactions of dark matter candidates, require extremely low levels of background. When these experiments are performed using macro-bolometers, radioactive contamination ... ...

    Abstract Experiments searching for rare events, such as neutrinoless double beta decay and interactions of dark matter candidates, require extremely low levels of background. When these experiments are performed using macro-bolometers, radioactive contamination near the surfaces is of particular concern. In order to control the effects of surface contamination, we developed a novel technique that uses composite macro-bolometers to identify energy depositions that occur close to the surfaces of materials immediately surrounding the detector. The composite macro-bolometer proposed and studied here consists of a main energy absorber that is thermally coupled to and entirely surrounded by thin absorbers that act as active shields. Surface energy depositions can be rejected by the analysis of simultaneous signals in the main absorber and the shields. In this paper, we describe a full thermal model and experimental results for three prototype detectors. The detectors consist of Ge, Si, or TeO2 thin absorbers as active shields, all with TeO2 crystals as main absorbers. In all cases, the surface event rejection capability is clearly demonstrated. In addition, simulations and preliminary results show that it is possible to detect energy depositions that occurred on the shields without separate readout channels for them. The energy depositions in the shields are distinguished from those in the main absorber through pulse shape discrimination. This simplification makes this technique a viable method for the rejection of surface energy depositions in next-generation bolometric double beta decay searches, such as possible extensions or upgrades of the CUORE experiment.
    Keywords Nuclear Experiment ; Physics - Instrumentation and Detectors
    Subject code 621
    Publishing date 2011-03-08
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  2. Book ; Online: A first test of CUPID prototypal light detectors with NTD-Ge sensors in a pulse-tube cryostat

    CUPID collaboration / Alfonso, K. / Armatol, A. / Augier, C. / Avignone III, F. T. / Azzolini, O. / Balata, M. / Barabash, A. S. / Bari, G. / Barresi, A. / Baudin, D. / Bellini, F. / Benato, G. / Berest, V. / Beretta, M. / Bettelli, M. / Biassoni, M. / Billard, J. / Boldrini, V. /
    Branca, A. / Brofferio, C. / Bucci, C. / Camilleri, J. / Campani, A. / Capelli, C. / Capelli, S. / Cappelli, L. / Cardani, L. / Carniti, P. / Casali, N. / Celi, E. / Chang, C. / Chiesa, D. / Clemenza, M. / Colantoni, I. / Copello, S. / Craft, E. / Cremonesi, O. / Creswick, R. J. / Cruciani, A. / D'Addabbo, A. / D'Imperio, G. / Dabagov, S. / Dafinei, I. / Danevich, F. A. / De Jesus, M. / de Marcillac, P. / Dell'Oro, S. / Di Domizio, S. / Di Lorenzo, S. / Dixon, T. / Dompé, V. / Drobizhev, A. / Dumoulin, L. / Fantini, G. / Faverzani, M. / Ferri, E. / Ferri, F. / Ferroni, F. / Figueroa-Feliciano, E. / Foggetta, L. / Formaggio, J. / Franceschi, A. / Fu, C. / Fu, S. / Fujikawa, B. K. / Gallas, A. / Gascon, J. / Ghislandi, S. / Giachero, A. / Gianvecchio, A. / Girola, M. / Gironi, L. / Giuliani, A. / Gorla, P. / Gotti, C. / Grant, C. / Gras, P. / Guillaumon, P. V. / Gutierrez, T. D. / Han, K. / Hansen, E. V. / Heeger, K. M. / Helis, D. L. / Huang, H. Z. / Imbert, L. / Johnston, J. / Juillard, A. / Karapetrov, G. / Keppel, G. / Khalife, H. / Kobychev, V. V. / Kolomensky, Yu. G. / Konovalov, S. I. / Kowalski, R. / Langford, T. / Lefevre, M. / Liu, R. / Liu, Y. / Loaiza, P. / Ma, L. / Madhukuttan, M. / Mancarella, F. / Marini, L. / Marnieros, S. / Martinez, M. / Maruyama, R. H. / Mas, Ph. / Mayer, D. / Mazzitelli, G. / Mei, Y. / Milana, S. / Morganti, S. / Napolitano, T. / Nastasi, M. / Nikkel, J. / Nisi, S. / Nones, C. / Norman, E. B. / Novosad, V. / Nutini, I. / O'Donnell, T. / Olivieri, E. / Olmi, M. / Ouellet, J. L. / Pagan, S. / Pagliarone, C. / Pagnanini, L. / Pattavina, L. / Pavan, M. / Peng, H. / Pessina, G. / Pettinacci, V. / Pira, C. / Pirro, S. / Poda, D. V. / Polischuk, O. G. / Ponce, I. / Pozzi, S. / Previtali, E. / Puiu, A. / Quitadamo, S. / Ressa, A. / Rizzoli, R. / Rosenfeld, C. / Rosier, P. / Scarpaci, J. A. / Schmidt, B. / Sharma, V. / Shlegel, V. N. / Singh, V. / Sisti, M. / Slocum, P. / Speller, D. / Surukuchi, P. T. / Taffarello, L. / Tomei, C. / Torres, J. A. / Tretyak, V. I. / Tsymbaliuk, A. / Velazquez, M. / Vetter, K. J. / Wagaarachchi, S. L. / Wang, G. / Wang, L. / Wang, R. / Welliver, B. / Wilson, J. / Wilson, K. / Winslow, L. A. / Xue, M. / Yan, L. / Yang, J. / Yefremenko, V. / Umatov, V. I. / Zarytskyy, M. M. / Zhang, J. / Zolotarova, A. / Zucchelli, S.

    2023  

    Abstract: CUPID is a next-generation bolometric experiment aiming at searching for neutrinoless double-beta decay with ~250 kg of isotopic mass of $^{100}$Mo. It will operate at $\sim$10 mK in a cryostat currently hosting a similar-scale bolometric array for the ... ...

    Abstract CUPID is a next-generation bolometric experiment aiming at searching for neutrinoless double-beta decay with ~250 kg of isotopic mass of $^{100}$Mo. It will operate at $\sim$10 mK in a cryostat currently hosting a similar-scale bolometric array for the CUORE experiment at the Gran Sasso National Laboratory (Italy). CUPID will be based on large-volume scintillating bolometers consisting of $^{100}$Mo-enriched Li$_2$MoO$_4$ crystals, facing thin Ge-wafer-based bolometric light detectors. In the CUPID design, the detector structure is novel and needs to be validated. In particular, the CUORE cryostat presents a high level of mechanical vibrations due to the use of pulse tubes and the effect of vibrations on the detector performance must be investigated. In this paper we report the first test of the CUPID-design bolometric light detectors with NTD-Ge sensors in a dilution refrigerator equipped with a pulse tube in an above-ground lab. Light detectors are characterized in terms of sensitivity, energy resolution, pulse time constants, and noise power spectrum. Despite the challenging noisy environment due to pulse-tube-induced vibrations, we demonstrate that all the four tested light detectors comply with the CUPID goal in terms of intrinsic energy resolution of 100 eV RMS baseline noise. Indeed, we have measured 70--90 eV RMS for the four devices, which show an excellent reproducibility. We have also obtained outstanding energy resolutions at the 356 keV line from a $^{133}$Ba source with one light detector achieving 0.71(5) keV FWHM, which is -- to our knowledge -- the best ever obtained when compared to $\gamma$ detectors of any technology in this energy range.

    Comment: Prepared for submission to JINST; 16 pages, 7 figures, and 1 table
    Keywords Physics - Instrumentation and Detectors ; Nuclear Experiment
    Subject code 621
    Publishing date 2023-04-10
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  3. Article: Apparatus to study crystal channeling and volume reflection phenomena at the SPS H8 beamline.

    Scandale, Walter / Efthymiopoulos, Ilias / Still, Dean A / Carnera, Alberto / Della Mea, Gianantonio / De Salvador, Davide / Milan, Riccardo / Vomiero, Alberto / Baricordi, Stefano / Chiozzi, Stefano / Dalpiaz, Pietro / Damiani, Chiara / Fiorini, Massimiliano / Guidi, Vincenzo / Martinelli, Giuliano / Mazzolari, Andrea / Milan, Emiliano / Ambrosi, Giovanni / Azzarello, Philipp /
    Battiston, Roberto / Bertucci, Bruna / Burger, William J / Ionica, Maria / Zuccon, Paolo / Cavoto, Gianluca / Santacesaria, Roberta / Valente, Paolo / Vallazza, Erik / Afonin, Alexander G / Baranov, Vladimir T / Chesnokov, Yury A / Kotov, Vladilen I / Maisheev, Vladimir A / Yazynin, Igor A / Afanasiev, Sergey V / Kovalenko, Alexander D / Taratin, Alexander M / Bondar, Nikolai F / Denisov, Alexander S / Gavrikov, Yury A / Ivanov, Yuri M / Ivochkin, Vladimir G / Kosyanenko, Sergey V / Lapina, Lyubov P / Levtchenko, Peter M / Petrunin, Anatoli A / Skorobogatov, Vyacheslav V / Suvorov, Vsevolod M / Bolognini, Davide / Foggetta, Luca / Hasan, Said / Prest, Michela

    The Review of scientific instruments

    2008  Volume 79, Issue 2 Pt 1, Page(s) 23303

    Abstract: A high performance apparatus has been designed and built by the H8-RD22 collaboration for the study of channeling and volume reflection phenomena in the interaction of 400 GeV/c protons with bent silicon crystals, during the 2006 data taking in the ... ...

    Abstract A high performance apparatus has been designed and built by the H8-RD22 collaboration for the study of channeling and volume reflection phenomena in the interaction of 400 GeV/c protons with bent silicon crystals, during the 2006 data taking in the external beamline H8 of the CERN SPS. High-quality silicon short crystals were bent by either anticlastic or quasimosaic effects. Alignment with the highly parallel (8 murad divergence) proton beam was guaranteed through a submicroradian goniometric system equipped with both rotational and translational stages. Particle tracking was possible by a series of silicon microstrip detectors with high-resolution and a parallel plate gas chamber, triggered by various scintillating detectors located along the beamline. Experimental observation of volume reflection with 400 GeV/c protons proved true with a deflection angle of (10.4+/-0.5) murad with respect to the unperturbed beam, with a silicon crystal whose (111) planes were parallel to the beam.
    Language English
    Publishing date 2008-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 209865-9
    ISSN 1089-7623 ; 0034-6748
    ISSN (online) 1089-7623
    ISSN 0034-6748
    DOI 10.1063/1.2832638
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Bonn / Germany

    Z 4' 46/112: Show issues

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  4. Article: High-efficiency volume reflection of an ultrarelativistic proton beam with a bent silicon crystal.

    Scandale, Walter / Still, Dean A / Carnera, Alberto / Della Mea, Gianantonio / De Salvador, Davide / Milan, Riccardo / Vomiero, Alberto / Baricordi, Stefano / Dalpiaz, Pietro / Fiorini, Massimiliano / Guidi, Vincenzo / Martinelli, Giuliano / Mazzolari, Andrea / Milan, Emiliano / Ambrosi, Giovanni / Azzarello, Philipp / Battiston, Roberto / Bertucci, Bruna / Burger, William J /
    Ionica, Maria / Zuccon, Paolo / Cavoto, Gianluca / Santacesaria, Roberta / Valente, Paolo / Vallazza, Erik / Afonin, Alexander G / Baranov, Vladimir T / Chesnokov, Yury A / Kotov, Vladilen I / Maisheev, Vladimir A / Yaznin, Igor A / Afansiev, Sergey V / Kovalenko, Alexander D / Taratin, Alexander M / Denisov, Alexander S / Gavrikov, Yury A / Ivanov, Yuri M / Ivochkin, Vladimir G / Kosyanenko, Sergey V / Petrunin, Anatoli A / Skorobogatov, Vyacheslav V / Suvorov, Vsevolod M / Bolognini, Davide / Foggetta, Luca / Hasan, Said / Prest, Michela

    Physical review letters

    2007  Volume 98, Issue 15, Page(s) 154801

    Abstract: The volume reflection phenomenon was detected while investigating 400 GeV proton interactions with bent silicon crystals in the external beam H8 of the CERN Super Proton Synchrotron. Such a process was observed for a wide interval of crystal orientations ...

    Abstract The volume reflection phenomenon was detected while investigating 400 GeV proton interactions with bent silicon crystals in the external beam H8 of the CERN Super Proton Synchrotron. Such a process was observed for a wide interval of crystal orientations relative to the beam axis, and its efficiency exceeds 95%, thereby surpassing any previously observed value. These observations suggest new perspectives for the manipulation of high-energy beams, e.g., for collimation and extraction in new-generation hadron colliders, such as the CERN Large Hadron Collider.
    Language English
    Publishing date 2007-04-13
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.98.154801
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Bonn / Germany

    Z 4' 58/153: Show issues

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

To top