The polarized deuteron target at COMPASS in 2022

被引：0

作者：

Doshita, N. ^{[1
]}

Ito, Y. ^{[1
]}

Iwata, T. ^{[1
]}

Kohri, H. ^{[1
]}

Kondo, K. ^{[1
]}

Miyachi, Y. ^{[1
]}

Nukazuka, G. ^{[1
]}

Takanashi, Y. ^{[1
]}

Meyer, W. ^{[2
]}

Reicherz, G. ^{[2
]}

Finger, M. ^{[3
]}

Pesek, M. ^{[3
]}

Horikawa, N. ^{[4
]}

Suzuki, H. ^{[4
]}

Koivuniemi, J. ^{[5
]}

Pires, C. ^{[6
]}

Matsuda, T. ^{[7
]}

Levorato, S. ^{[8
]}

Triloki, T. ^{[8
]}

机构：

[1] Yamagata Univ, Yamagata, Japan

[2] Ruhr Univ Bochum, Bochum, Germany

[3] Charles Univ Prague, Prague, Czech Republic

[4] Chubu Univ, Kasugai, Aichi, Japan

[5] Univ Illinois, Chicago, IL USA

[6] LIP, Lisbon, Portugal

[7] Univ Miyazaki, Miyazaki, Japan

[8] INFN Trieste, Trieste, Italy

来源：

19TH WORKSHOP ON POLARIZED SOURCES, TARGETS AND POLARIMETRY | 2023年

关键词：

D O I：

暂无

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The COMPASS experiment at CERN used a upgraded transversely polarized deuteron target with a muon beam of 160 GeV/c for SIDIS measurements in 2022. The deuteron target material of 6LiD installed in 3 cells was polarized by the DNP method with a 2.5 T magnet, a dilution refrigerator and three 70 GHz microwave oscillators. During the data-taking the target operates in a transversely oriented magnetic dipole field at 0.6 T. This frozen spin operation mode without DNP process leads to a slow depolarization. Nevertheless, it was important to reach 40 % polarization that is sufficient for spin asymmetry measurement. The newly installed 3 microwave oscillators played a significant role to increase the polarization. We obtained deuteron polarizations of more than 40 % in each cell for two days. The relaxation time of the deuteron polarizations during the data taking period was measured to be about 5000 h at 0.6 T and below 100 mK.

引用

页数：5

共 50 条

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Doshita, N.
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Goertz, St.
Hasegawa, T.
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Hess, Ch.
Horikawa, N.
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Koivuniemi, J.
Kondo, K.
Le Goff, J-M.
Magnon, A.
Marchand, C.
Matsuda, T.
Meyer, W.
Reicherz, G.
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CZECHOSLOVAK JOURNAL OF PHYSICS, 2006, 56 : F295 - F305
[2] The COMPASS polarized target
Gautheron, F
Baum, G
Kisselev, Y
Doshita, N
Goertz, S
Koivuniemi, J
Kondo, K
Meyer, W
Reicherz, G
Ball, J
Magnon, A
Marchand, C
SPIN 2004: 16TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM, 2005, : 791 - 795
[3] The COMPASS polarized target
Doshita, N
Ball, J
Baum, G
Finger, M
Gautheron, F
Goertz, S
Hasegawa, T
Horikawa, N
Ishimoto, S
Iwata, T
Kisselev, Y
Koivuniemi, J
Kondo, K
Matsuda, T
Meyer, W
Neliba, S
Reicherz, G
CZECHOSLOVAK JOURNAL OF PHYSICS, 2005, 55 : A367 - A374
[4] Polarization measurement in the COMPASS polarized target
Kondo, K
Ball, J
Baum, G
Berglund, P
Doshita, N
Gautheron, F
Goertz, S
Hasegawa, T
Horikawa, N
Ishimoto, S
Iwata, T
Kisselev, Y
Koivuniemi, J
LeGoff, JM
Magnon, A
Matsuda, T
Meyer, W
Reicherz, G
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2004, 526 (1-2): : 70 - 75
[5] Dilution refrigerator for COMPASS polarized target
Berglund, P
Gehring, R
Koivuniemi, J
Kyynäräinen, J
Takabayashi, N
PHYSICA B, 2000, 284 : 2012 - 2013
[6] The COMPASS polarized target in 2006 and 2007
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Gautheron, F.
Goertz, St.
Hasegawa, T.
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Iwata, T.
Kisselev, Y.
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Kondo, K.
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Radtke, E.
Reicherz, G.
PSTP 2007, 2007, 980 : 307 - +
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ARENHOVEL, H
LEIDEMANN, W
TOMUSIAK, EL
PHYSICAL REVIEW C, 1992, 46 (02): : 455 - 470
[8] INCLUSIVE DEUTERON ELECTRODISINTEGRATION WITH POLARIZED ELECTRONS AND A POLARIZED TARGET
LEIDEMANN, W
TOMUSIAK, EL
ARENHOVEL, H
PHYSICAL REVIEW C, 1991, 43 (03): : 1022 - 1037
[9] A MEDIUM SIZE POLARIZED DEUTERON TARGET
KISELEV, YF
POLYAKOV, VV
KOVALEV, AI
BUNYATOVA, EI
BORISOV, NS
TRAUTMAN, VY
WERNER, K
KOZLENKO, NG
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1984, 220 (2-3): : 399 - 405
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Stolarski, Marcin
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS, 2008, 184 : 52 - 55

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