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Title: LERF - New Life for the Jefferson Laboratory FEL

Conference ·
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  1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  3. Hampton Univ., Hampton, VA (United States)
  4. Arizona State Univ., Mesa, AZ (United States)
  5. Stony Brook Univ., NY (United States)
  6. Technische Universität Dresden (Germany)
  7. Commissariat a l'Energie Atomique (CEA), Saclay (France)
  8. Temple Univ., Philadelphia, PA (United States)
+ Show Author Affiliations

In 2012 Jefferson Laboratory's energy recovery linac (ERL) driven Free Electron Laser successfully completed a transmission test in which high current CW beam (4.3 mA at 100 MeV) was transported through a 2 mm aperture for 7 hours with beam losses as low as 3 ppm. The purpose of the run was to mimic an internal gas target for DarkLight — an experiment designed to search for a dark matter particle. The ERL was not run again until late 2015 for a brief re-commissioning in preparation for the next phase of DarkLight. In the intervening years, the FEL was rebranded as the Low Energy Recirculator Facility. In 2016 several weeks of operation were allocated to configure the machine for DarkLight with the purpose of exercising – for the first time – an internal gas target in an ERL. Despite a number of challenges, including the inability to energy recover without losses (precluding CW operation), beam was delivered to a target of thickness 1018 cm-2 which represents a three order of magnitude increase in thickness from previous internal target experiments. Details of the machine configuration and operational experience will be discussed.

Research Organization:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
DOE Contract Number:
AC05-06OR23177
OSTI ID:
1986170
Report Number(s):
JLAB-ACP-17-2521; DOE/OR/23177-4175
Resource Relation:
Conference: Proceedings, 59th ICFA Advanced Beam Dynamics Workshop on Energy Recovery Linacs, ERL2017 : Geneva, Switzerland, June 18-23, 2017
Country of Publication:
United States
Language:
English

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