Name: Beam Polarization and Polarimetry at EIC
Start: 2020-06-26T08:00:00-04:00
End: 2020-07-01T19:00:00-04:00
Location: online

Beam Polarization and Polarimetry at EIC

from Friday, 26 June 2020 (08:00) to Wednesday, 1 July 2020 (19:00)

Monday, 22 June 2020
Tuesday, 23 June 2020
Wednesday, 24 June 2020
Thursday, 25 June 2020
Friday, 26 June 2020
08:00 Welcome - Abhay Deshpande (Stony Brook University)
Welcome
- Abhay Deshpande (Stony Brook University)
08:00 - 08:15
08:15 Physics drivers for polarized beam - Andrea Bressan
Physics drivers for polarized beam
- Andrea Bressan
08:15 - 08:45
08:45 EIC accelerator design - Christoph Montag (BNL) Christoph Montag (BNL)
EIC accelerator design
- Christoph Montag (BNL)
- Christoph Montag (BNL)
08:45 - 09:15
09:15 Physics with polarized positrons - Eric Voutier
Physics with polarized positrons
- Eric Voutier
09:15 - 09:45
09:45 Possibilities of polarized positrons - Joe Grames (Jefferson Lab)
Possibilities of polarized positrons
- Joe Grames (Jefferson Lab)
09:45 - 10:15
10:15 Streching break
Streching break
10:15 - 10:35
10:35 What is planned at ILC - Jenny List (DESY)
What is planned at ILC
- Jenny List (DESY)
10:35 - 11:05
11:05 Polarization Upgrade and Polarimetry at the SuperKEKB Facility - Wouter Deconinck
Polarization Upgrade and Polarimetry at the SuperKEKB Facility
- Wouter Deconinck
11:05 - 11:35
SuperKEKB is an unpolarized electron-positron collider designed for a luminosity of 8 × 1035 cm−2s−1 with a 4 GeV positron beam (Low Energy Ring - LER) and 7 GeV electron beam (High Energy Ring - HER). To enable precision measurements of the weak neutral couplings in the Belle II experiment, an upgrade is under consideration to polarize the HER to 70% by injecting polarized electrons (due to the short beam lifetime, Sokolov-Ternov self-polarization is impractical). In most areas of the HER the spin will be oriented transversely, but around the interaction region spin rotators will align the spin longitudinally. In addition to Mott polarimetry in the injector, we will measure the stored beam polarization to a precision of 0.5% with a combination of Compton polarimetry and measurements of the forward-backward asymmetries in e+e− &rightarrow; τ+τ− events at the interaction point. This will allow measurements of sin2 θWeff with a combined uncertainty comparable to the Z0 world average measured uncertainty of &pm;0.00016 from LEP and SLD, but made at a significantly lower energy scale of 10.58 GeV.
11:35 Transparent Spin Mode for Polarized Beams in the EIC - Yuri Filatov (MIPT)
Transparent Spin Mode for Polarized Beams in the EIC
- Yuri Filatov (MIPT)
11:35 - 12:05
The transparent spin (TS) technique has been proposed as an efficient high-flexible method to control the beam polarization, from acceleration to long-term maintenance and real-time spin manipulation during an experimental run of a collider. Attractiveness of the TS method is that it allows for manipulation of the polarization using small insertions of weak magnetic fields (stationary or quasi-static) not affecting the orbital dynamics. The TS mode allows one to do frequent coherent spin flips of the beam to reduce experiment’s systematic errors, and carry out ultrahigh precision experiments. The TS mode may allow one to significantly expand the capabilities of polarized beam experiments at the RHIC-based EIC at BNL in the US. It makes it possible to manipulate the polarizations of proton and 3He beams during experiments in the collider’s entire energy range. The TS mode is also considered for spin control of polarized deuterons near the energies corresponding to integer spin resonances. The talk presents schemes for proton and deuteron polarization control using the TS mode in RHIC.
12:05 Lunch
Lunch
12:05 - 13:00
13:00 Physics with polarized Deuterons - Ellie Long (University of New Hempshire)
Physics with polarized Deuterons
- Ellie Long (University of New Hempshire)
13:00 - 13:30
13:30 Feasibility of Polarized Deuteron Beam - Haixin Huang (Brookhaven National Lab)
Feasibility of Polarized Deuteron Beam
- Haixin Huang (Brookhaven National Lab)
13:30 - 14:00
14:00 Polarised beams in particle colliders - Mei Bai Mei Bai (BNL)
Polarised beams in particle colliders
- Mei Bai
- Mei Bai (BNL)
14:00 - 14:30
14:30 Discussion
Discussion
14:30 - 15:30
Saturday, 27 June 2020
Sunday, 28 June 2020