Smith, G. R. (2012) The Qweak target performance. Il nuovo cimento C, 35 (4). pp. 159-163. ISSN 1826-9885
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Abstract
The Qweak Experiment at Jefferson Laboratory aims to measure the parity violating ep scattering asymmetry at low Q2 to a statistical precision of only 5 ppb. Such precision presents many challenges for the liquid-hydrogen target used in the experiment. The 35 cm long Qweak target was designed to withstand 180 μA of beam current. Although this is the highest power cryotarget ever built, the target must also provide < 50 ppm of target noise under these demanding conditions, which makes it the lowest noise target ever built at the same time. These seemingly mutually exclusive goals have both been met. The target will be described, and measurements of its performance will be presented.
| Item Type: | Article |
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| Uncontrolled Keywords: | Nuclear tests of fundamental interactions and symmetries ; Elastic electron scattering ; Particle sources and targets |
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 21 Apr 2020 18:42 |
| Last Modified: | 21 Apr 2020 18:42 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/17905 |
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