22-26 July 2019
Ecole Nationale Supérieure de Chimie
Europe/Paris timezone

Development of a Polarized 3He++ Ion Source for the EIC

23 Jul 2019, 11:00
Amphi Friedel (Ecole Nationale Supérieure de Chimie)

Amphi Friedel

Ecole Nationale Supérieure de Chimie

11 Rue Pierre et Marie Curie, 75005 Paris
Oral presentation Accelerator R&D Parallel session A


Matthew Musgrave (MIT)


The capability of accelerating a high-intensity polarized $^{3}$He ion beam would provide an effective polarized neutron beam for the study of new high-energy QCD studies of nucleon structure. This development is essential for the future Electron Ion Collider, which could use a polarized $^{3}$He ion beam to probe the spin structure of the neutron. The proposed polarized $^{3}$He ion source is based on the Electron Beam Ion Source (EBIS) currently in operation at Brookhaven National Laboratory. $^{3}$He gas would be polarized within the 5 T field of the EBIS solenoid via Metastability Exchange Optical Pumping (MEOP) and then pulsed into the EBIS vacuum and drift tube system where the $^{3}$He will be ionized by the 10 Amp electron beam. The goal of the polarized $^{3}$He ion source is to achieve $2.5 \times 10^{11}$ $^{3}$He$^{++}$/pulse at 70% polarization. An upgrade of the EBIS is currently underway. An absolute polarimeter and spin-rotator is being developed to measure the $^{3}$He ion polarization at 6 MeV after initial acceleration out of the EBIS. The source is being developed through collaboration between BNL and MIT.

Primary authors

Matthew Musgrave (MIT) Edward Beebe (Brookhaven National Laboratory) Richard Milner (Massachusetts Institute of Technology) Grigor Atoian (Brookhaven National Lab) Sergey Kondrashev (Brookhaven National Lab) Deepak Raparia (Brookhaven National Lab) John Ritter (Brookhaven National Lab) Masahiro Okamura (Brookhaven National Lab) Shunsuke Ikeda (Brookhaven National Lab) Anatoli Zelenski (Brookhaven National Lab) James Maxwell (Thomas Jefferson National Accelerator Facility) Takeshi Kanesue (Brookhaven National Lab) Bob Schoepfer (Brookhaven National Lab) Steven Trabocchi (Brookhaven National Lab) Andrei Poblaguev (Brookhaven National Lab) Alexander Pikin (CERN)

Presentation Materials