Title
| Polarized target at COMPASS |
Author(s)
|
Doshita, Norihiro (Yamagata U.) ; Iwata, Takahiro (Yamagata U.) ; Kondo, Kaori (Yamagata U.) ; Miyachi, Yoshiyuki (Yamagata U.) ; Nukazuka, Genki (Yamagata U.) ; Reicherz, Gerhard (Ruhr U., Bochum) ; Meyer, Werner (Ruhr U., Bochum) ; Finger, Miroslav (Charles U.) ; Pesek, Michael (Charles U.) ; Horikawa, Naoaki (Chubu U.) ; Suzuki, Hajime (Chubu U.) ; Koivuniemi, Jaakko Henrik (Illinois U., Urbana (main)) ; Kisselev, Yuri (Dubna, JINR) ; Ishimoto, Shigeru (KEK, Tsukuba) ; Pires, Christophe (LIP) ; Matsuda, Tatsuro (Miyazaki U.) Visa alla 16 författare |
Publication
| SISSA, 2020 |
Number of pages
| 6 |
In:
| PoS PSTP2019 (2020) 049 |
In:
| 18th International Workshop on Polarized Sources, Targets, and Polarimetry (PSTP 2019), Knoxville, United States, 23 - 27 Sep 2019, pp.049 |
DOI
| 10.22323/1.379.0049
|
Subject category
| Accelerators and Storage Rings |
Accelerator/Facility, Experiment
| CERN SPS ; NA58 |
Abstract
| The transversely polarized solid proton target was used in 2015 and 2018 for the polarized Drell- Yan experiment at the first in the world with a 108 /s intensity of 190 GeV pion beam at COM- PASS. Because of the radiation damage, the deterioration of the proton relaxation time of NH3 was observed over more than 6 months data taking period. The radiation also affected the cryogenics control system in 2015. The radiation shield was improved and any incidents on the ra- diation was not observed in 2018. The transversely polarized deuteron target will be applied in 2021 with a muon beam of 160 GeV for Transversity and Sivers parton distribution functions measurements. A cooling test of the polarized target system will be performed in 2020. |
Copyright/License
| © 2020-2024 CC-BY-NC-ND-4.0 |