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  1. Article ; Online: Temporal evolution of electron cloud in a cylindrical Penning trap at room temperature.

    Nandi, J / Sikdar, A K / Kumar, A / Alam, S / Das, P / Ray, A

    The Review of scientific instruments

    2024  Volume 95, Issue 4

    Abstract: The temporal evolution of the electron cloud at room temperature has been recorded through a resonance circuit by observing the axial oscillation frequency of its center of mass. The electron cloud undergoes radial expansion by interacting with the ... ...

    Abstract The temporal evolution of the electron cloud at room temperature has been recorded through a resonance circuit by observing the axial oscillation frequency of its center of mass. The electron cloud undergoes radial expansion by interacting with the residual gas molecules, and it is finally lost upon hitting the Penning trap electrodes. It has been confirmed through detailed experimental investigations that the unique temporal pattern of frequency variation is a consequence of the cloud's radial expansion. Consequently, this approach offers a non-destructive means for single-shot detection, enabling continuous monitoring of the electron cloud's radial expansion during the confinement time. This technique offers a significant advantage over its destructive alternatives.
    Language English
    Publishing date 2024-04-23
    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 10.1063/5.0194917
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Design of a helical resonator with improved figure of merit.

    Nandi, J / Sikdar, A K / Das, P / Ray, A

    The Review of scientific instruments

    2022  Volume 93, Issue 1, Page(s) 14706

    Abstract: A helical resonator serves as a key element for the detection of the trapped charged particles in a Penning trap. In order to compare the performance of the helical resonators, the concept of figure of merit (FOM) was introduced by Ulmer et al. [Nucl. ... ...

    Abstract A helical resonator serves as a key element for the detection of the trapped charged particles in a Penning trap. In order to compare the performance of the helical resonators, the concept of figure of merit (FOM) was introduced by Ulmer et al. [Nucl. Instrum. Methods Phys. Res., Sect. A 705, 55-60 (2013)]. In this work, we optimized the geometrical parameters of a resonator by numerical simulations keeping its outer dimensions and the diameter of the copper wire fixed and obtained the best possible value of FOM under these constraints. The corresponding 95 MHz helical resonator has been designed and fabricated, and its measured value of FOM is in good agreement with the simulated values. An empirical relationship between the total length of the wire to make the helical coil and the resonance frequency has been obtained. The simulations show that the FOM increases considerably with the increase in the conductivity of the building material, and this would be useful in detecting the feeble trap signal in cryogenic environment.
    Language English
    Publishing date 2022-02-01
    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 10.1063/5.0065422
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Fabrication of non-magnetic multi-pin coaxial vacuum feedthrough system for cryogenic applications.

    Sikdar, A K / Nandi, J / Das, P / Ray, A

    The Review of scientific instruments

    2020  Volume 91, Issue 7, Page(s) 74707

    Abstract: We have developed and tested a compact non-magnetic feedthrough made of epoxy resin and capable of maintaining vacuum leak tightness over a wide temperature range (300 K-4 K). It is equipped with 15 electrical pins and three 50 Ω coaxial lines. The ... ...

    Abstract We have developed and tested a compact non-magnetic feedthrough made of epoxy resin and capable of maintaining vacuum leak tightness over a wide temperature range (300 K-4 K). It is equipped with 15 electrical pins and three 50 Ω coaxial lines. The feedthrough has been designed to apply a high voltage (up to 5 kV) and transmit radio-frequency signals for operating a Penning trap over a wide temperature range (300 K-4 K). The characteristic impedances of the coaxial lines have been measured at 300 K and 77 K and found to remain ∼50 Ω over the frequency range of our interest (10 MHz-80 MHz). The details of its fabrication and performance over a wide temperature range have been discussed.
    Language English
    Publishing date 2020-08-04
    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 10.1063/5.0004418
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Quasifision timescale

    Ray A. / Sikdar A. K. / De A.

    EPJ Web of Conferences, Vol 86, p

    Zeptosecond versus attosecond

    2015  Volume 00038

    Abstract: Recently a controversy has developed regarding the timescales of quasifission and fission processes of highly excited (EX > 50 MeV) transuranium and uranium-like nuclei. The mass-angle distributions of quasifission fragments indicate exponential decay ... ...

    Abstract Recently a controversy has developed regarding the timescales of quasifission and fission processes of highly excited (EX > 50 MeV) transuranium and uranium-like nuclei. The mass-angle distributions of quasifission fragments indicate exponential decay law giving timescale of the order of 10-21 sec for the quasifission process, whereas for the similar reactions, timescale of the order of 10-18 sec were obtained from the crystal blocking technique. In the case of fission of highly excited uranium-like and transuranium nuclei, X-ray-fission fragment coincidence technique gives similar timescales ~10-18 sec, contradicting much shorter timescales obtained from nuclear techniques. We think the quantum decoherence time of the quasifission/fission decay process could be of the order of 10-18 sec and present a quantum mechanical explanation to resolve the puzzle.
    Keywords Physics ; QC1-999 ; Science ; Q
    Language English
    Publishing date 2015-01-01T00:00:00Z
    Publisher EDP Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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  5. Book ; Online: Effect of variations in the gas mixture compositions on the timing and charge of glass RPC

    Sikdar, A. K. / Sadiq, J. / Behera, P. K.

    2019  

    Abstract: The India-based Neutrino Observatory (INO) is a project aimed at building a large underground laboratory to explore the Earth's mater effects on the atmospheric neutrinos in multi-GeV range. INO will host a 50 kton magnetized iron calorimeter detector ( ... ...

    Abstract The India-based Neutrino Observatory (INO) is a project aimed at building a large underground laboratory to explore the Earth's mater effects on the atmospheric neutrinos in multi-GeV range. INO will host a 50 kton magnetized iron calorimeter detector (ICAL) in which Resistive Plate Chambers(RPCs) will be the active detector elements. In ICAL, 28,800 glass RPCs of 2 m $\times$ 2 m size will be operated in the avalanche mode. A small variation in the compositions of ionizing gaseous medium in the RPC affects its performance. Study of the charge distribution of the RPC at different gas compositions is necessary to optimize the gas mixture. An RPC made with glass plates of dimension 30 cm $\times$ 30 cm was operated in avalanche mode with a gas mixture of $C_2H_2F_4$/$iC_4H_{10}$/$SF_6$. We have studied the performance of these RPCs at the same ambient conditions. The percentages of the $iC_4H_{10}$ or $SF_6$ were varied and its effect on the performance of RPC were studied. The study of the charge distribution and time resolution of the RPC signals at different gas compositions is presented in this paper.
    Keywords Physics - Instrumentation and Detectors ; High Energy Physics - Experiment
    Subject code 621
    Publishing date 2019-12-10
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article: Control of weeds in irrigated mulberry gardens

    Sikdar, A.K / Krishnaswami, S

    Indian journal of agronomy. Sept 1980. v. 25 (3)

    1980  

    Title variant Control of weeds in irrigated mulberry gardens [Morus indica]
    Keywords Morus alba ; India
    Language English
    Dates of publication 1980-09
    Size p. 382-386.
    Document type Article
    ZDB-ID 407899-8
    ISSN 0537-197X
    ISSN 0537-197X
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 3085: Show issues

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  7. Article: Assessment of leaf yield loss of the two mulberry varieties due to leafspot disease

    Sikdar, A.K / Krishnaswami, S

    Indian journal of sericulture. 1980. v. 19 (1)

    1980  

    Title variant Assessment of leaf yield loss of the two mulberry varieties due to leafspot disease [Cercospora moricola, Morus indica, India].
    Keywords Morus alba ; India
    Language English
    Size p. 9-12.
    Document type Article
    ZDB-ID 742396-2
    ISSN 0445-7722
    ISSN 0445-7722
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 4197: Show issues

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  8. Article: A note on the control of root-knot nematode disease of mulberry by soil fumigation

    Sikdar, A.K / Shenoi, M.M

    Indian journal of sericulture. 1980. v. 19 (1)

    1980  

    Title variant A note on the control of root-knot nematode disease of mulberry by soil fumigation [Meloidogyne incognita, Morus indica, India].
    Keywords Morus alba ; Meloidogyne incognita ; India
    Language English
    Size p. 41-42.
    Document type Article
    ZDB-ID 742396-2
    ISSN 0445-7722
    ISSN 0445-7722
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 4197: Show issues

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  9. Article: Cytomorphological studies in triploid mulberry evolved by diploidization of female gamete cells

    Dwivedi, N.K / Suryanarayana, N / Sikdar, A.K / Susheelamma, B.N / Jolly, M.S

    Cytologia : international journal of cytology. Mar 1989. v. 54 (1)

    1989  

    Keywords Morus alba ; diploidy ; germ cells ; cultivars ; pollen ; mutants ; pollination ; seeds ; colchicine
    Language English
    Dates of publication 1989-03
    Size p. 13-19.
    Document type Article
    ZDB-ID 1646-9
    ISSN 1348-7019 ; 0011-4545
    ISSN (online) 1348-7019
    ISSN 0011-4545
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Cologne/Königswinter

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  10. Article: Effect of "ringing" and application of growth regulators and vitamins on the propagation of mulberry cuttings

    Mukherjee, S.K / Sikdar, A.K

    Indian journal of sericulture 1974, 13 (1)

    1974  

    Title variant Effect of "ringing" and application of growth regulators and vitamins on the propagation of mulberry [Morus alba] cuttings
    Keywords Morus alba ; India
    Language English
    Size p. 1-10.
    Document type Article
    ZDB-ID 742396-2
    ISSN 0445-7722
    ISSN 0445-7722
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

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