Electron Beam Diagnostics Of The JLAB UV FEL
In this contribution we describe various systems and aspects of the electron beam diagnostics of the JLab UV FEL. The FEL is installed on a new bypass beam line at the existing 10 kW IR Upgrade FEL. Here, we describe a set of the following systems. A combination of OTR and phosphor viewers is used for measurements of the transverse beam profile, transverse emittance, and Twiss parameters. This system is also used for alignment of the optical cavity of the UV oscillator and to ensure the overlap between the electron beam and optical mode in the FEL wiggler. A system of beam position monitors equipped with log-amp based BPM electronics. Bunch length on the order of 120 fs RMS is measured with the help of a modified Martin-Puplett interferometer. The longitudinal transfer function measurement system is used to set up bunch compression in an optimal way, such that the LINAC RF curvature is compensated using only higher order magnetic elements of the beam transport. This set of diagnostic systems made a significant contribution in achieving first lasing of the FEL after only about 60 hours of beam operation.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1059992
- Report Number(s):
- JLAB-FEL-11-1352; DOE/OR/23177-1588; TRN: US1300358
- Resource Relation:
- Conference: PAC 2011 (Particle Accelerator Conference), New York, NY (United States), 28 Mar - 1 Apr 2011; Related Information: Located at https://misportal.jlab.org/ul/publications/view_pub.cfm?pub_id=10399
- Country of Publication:
- United States
- Language:
- English
Similar Records
Bunch Length Measurements at the JLab FEL Using Coherent Transition and Synchrotron Radiation
Bunch Length Measurements at JLab FEL