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O Bourrion,
C Bernard,
D Bondoux,
J L Bouly,
J Bouvier,
B Boyer,
M Brinet,
M Buenerd,
G Damieux,
L Derome, [......],
M Marton,
A Menchaca-Rocha,
A Pelissier, J N Périé,
A Putze,
S Roudier,
Y Sallaz-Damaz,
E S Seo,
J P Scordilis,
Y S Yoon
[show abstract]
[hide abstract]
ABSTRACT: A proximity focusing Cherenkov imager called CHERCAM, has been built for the charge measurement of nuclear cosmic rays with the CREAM instrument. It consists of a silica aerogel radiator plane across from a detector plane equipped with 1,600 1`` diameter photomultipliers. The two planes are separated by a ring expansion gap. The Cherenkov light yield is proportional to the charge squared of the incident particle. The expected relative light collection accuracy is in the few percents range. It leads to an expected single element separation over the range of nuclear charge Z of main interest 1 ≤ Z26. CHERCAM is designed to fly with the CREAM balloon experiment. The design of the instrument and the implemented technical solutions allowing its safe operation in high altitude conditions (radiations, low pressure, cold) are presented.
Journal of Instrumentation 06/2011; 6(06):P06004. · 1.87 Impact Factor
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L. Derome,
A. Barrau,
R. Bazer-Bachi,
O. Bourrion,
J. Bouvier,
B. Boyer,
M. Buénerd,
L. Eraud,
R. Foglio,
L. Gallin-Martel, [......],
A. Menchaca-Rocha, J.N. Périé,
A. Putze,
Y. Sallaz-Damaz,
J.P. Scordilis,
E. S. Seo,
P. Walpole,
J.H. Yoo,
Y S Yoon,
S. Y. Zinn
[show abstract]
[hide abstract]
ABSTRACT: The CREAM experiment investigates the high energy spectrum of nuclear elements from H to Fe in the cosmic ray flux up to $10^{15}$ eV, with an instrument designed to achieve individual elements separation over the whole mass range. A proximity focused Cherenkov imager, CHERCAM (CHERenkov CAMera), will provide both a good topological signature (Cherenkov ring) for downgoing Z=1 particles, and a charge independent individual element separation through the considered range of nuclear charges. It will be implemented in the forthcoming CREAM flight 3. The contribution reports on the CHERCAM main features and on the preliminary results from in-beam tests at CERN.
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M. Mangin-Brinet,
A. Barrau,
R. Bazer-Bachi,
O. Bourrion,
J. Bouvier,
B. Boyer,
M. Buénerd,
L. Derome,
L. Eraud,
R. Foglio, [......],
C H Kim,
L. Lutz,
A. Malinine,
A. Menchaca-Rocha, J.N. Périé,
Y. Sallaz-Damaz,
J.P. Scordilis,
E. S. Seo,
P. Walpole,
S. Y. Zinn
[show abstract]
[hide abstract]
ABSTRACT: The CREAM experiment (Cosmic Ray Energetics and Mass) is dedicated to the measurement of the energy spectrum of nuclear elements in cosmic rays, over the range 10$^{12}$ to 10$^{15}$ eV. The individual elements separation, which is a key feature of CREAM, requires instruments with strong identification capabilities. A proximity focused type of Cherenkov imager, CHERCAM (CHERenkov CAMera), providing both a good signature of downgoing Z=1 particles and good single element separation through the whole range of nuclear charges [Buénerd et al. 28th ICRC, Tsukuba, OG 1.5, 2003, p. 2157], is under development. After a brief introduction, the main features and the construction status of the CHERCAM are being summarized.
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M. Buénerd,
A. Barrau,
R. Bazer-Bachi,
V. Borrel,
O. Bourrion,
J. Bouvier,
B. Boyer,
L. Derome,
L. Eraud,
R. Foglio, [......],
L. Lutz,
A. Malinine,
M. Mangin-Brinet,
A. Marcowith,
A. Menchaca-Rocha, J.N. Périé,
K. Protasov,
Y. Sallaz-Damaz,
E. S. Seo,
S. Y. Zinn
[show abstract]
[hide abstract]
ABSTRACT: A proximity focusing Cherenkov imager for the charge measurement of nuclear cosmic rays in the CREAM II instrument, called CHERCAM, is under construction. This imager consists of a silica aerogel radiator plane facing a detector plane equipped with standard photomultipliers. The two planes are separated by a minimal ring expansion gap. The Cherenkov light yield is proportional to the squared charge of the detected particle. The expected relative light collection accuracy is in the few percents range. It should lead to single element separation over the range of nuclear charge Z of main interest 1 $leq$ Z $<$\approx$ 26.
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A. Putze,
H S Ahn,
T. Anderson,
L. Barbier,
A. Barrau,
R. Bazer-Bachi,
J. J. Beatty,
P. Bhoyar,
T. J. Brandt,
M. Buénerd, [......],
I H Park,
N H Park, J.N. Périé,
Y. Sallaz-Damaz,
E. S. Seo,
P. Walpole,
J Wu,
J Yang,
J.H. Yoo,
Y S Yoon
Proceedings of the 21st European Cosmic Ray Symposium Kosice, Slovakia, 9 - 12 September 2008.
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Y. Sallaz-Damaz,
A. Barrau,
R. Bazer-Bachi,
O. Bourrion,
J. Bouvier,
B. Boyer,
M. Buénerd,
L. Derome,
L. Eraud,
R. Foglio, [......],
A. Malinine,
A. Menchaca-Rocha, J.N. Périé,
A. Putze,
J.-P. Scordilis,
E.S. Seo,
P. Walpole,
J.H. Yoo,
Y.S. Yoon,
S.Y. Zinn
[show abstract]
[hide abstract]
ABSTRACT: A Cherenkov imager, CHERCAM (CHERenkov CAMera), has been designed and built for the CREAM (Cosmic-Ray Energetic and Mass) balloon-borne experiment. The instrument will perform charge measurements of nuclear cosmic-ray over a range extending from proton to iron. It will achieve individual charge separation of the elements over this range [M. Buénerd, et al., in: 28th ICRC, Tsukuba, Japan, OG 1.5, 2003, p. 2157. [2]] (0.25 charge unit rms), allowing measurements of the energy spectra of individual elements by the CREAM instrument in the energy range from 1010 to . CHERCAM is a proximity focused imager, based on a dedicated mechanical structure, equipped with an n=1.05 silica aerogel radiator plane, separated by a 12 cm ring expansion gap from a photon detector plane consisting of a 1600 photomultiplier array, backed with dedicated front-end readout electronics. A prototype of the detector has been recently tested with 100 and 300 GeV/cZ=1 particle beams at CERN. The contribution reports on both the beam test results of the prototype, and of the counter performance in ground operation.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment.
