STI Publications - View Publication Form #12592
| Back to Search Results |
Publication Information
| Title | Dynamically polarized target for the g2p and GEp experiments at Jefferson Lab | ||||
| Abstract | We describe a dynamically polarized target that has been utilized for two electron scattering experiments in Hall A at Jefferson Lab. The primary components of the target are a new, high cooling power 4He evaporation refrigerator, and a re-purposed, superconducting split-coil magnet. It has been used to polarize protons in irradiated NH3 at a temperature of 1 K and at fields of 2.5 and 5.0 Tesla. The performance of the target material in the electron beam under these conditions will be discussed. Maximum polarizations of 28% and 95% were obtained at those fields, respectively. To satisfy the requirements of both experiments, the magnet had to be routinely rotated between angles of 0, 6, and 90 degrees with respect to the incident electron beam. This was accomplished using a new rotating vacuum seal which permits rotations to be performed in only a few minutes. | ||||
| Author(s) | Joshua Pierce, James Maxwell, Toby Badman, James Brock, Chris Carlin, Don Crabb, Donal Day, Nicholas Kvaltine, Dave Meekins, Jonathan Mulholland, Joshua Shields, Karl Slifer, Christopher Keith | ||||
| Publication Date | February 2014 | ||||
| Document Type | Journal Article | ||||
| Primary Institution | Thomas Jefferson National Accelerator Facility, Newport News | ||||
| Affiliation | Exp Nuclear Physics / Technical Support Groups / Cryo/Polarized Targets | ||||
| Funding Source | |||||
| Proprietary? | No | ||||
| This publication conveys | Technical Science Results | ||||
| Document Numbers |
|
||||
| Associated with an experiment | No | ||||
| Associated with EIC | No | ||||
| Supported by Jefferson Lab LDRD Funding | No |
Journal Article
| Journal Name | Nuclear Instruments & Methods in Physics Research, Section A |
| Refereed | Yes |
| Volume | 738 |
| Issue | |
| Page(s) | 54-60 |
Attachments/Datasets/DOI Link
| Document(s) |
1305.3295v4.pdf
(STI Document)
|
| DOI Link | |
| Dataset(s) | (none) |
| Back to Search Results |