New RF Control System for the 12 GeV Energy Upgrade of the CEBAF Accelerator at Jefferson Lab

Conference · Thu May 01 04:00:00 EDT 2008

DOI:https://doi.org/10.1117/12.817948· OSTI ID:955870

Plawski, Tomasz; Allison, Trent; Bachimanchi, Ramakrishna; Dong, Hai; Hovater, J; Musson, John

The CEBAF Accelerator at Jefferson Lab presently consists of 50 MeV injector, two anti-parallel superconducting linacs and two arcs for transporting beam between the linacs. By the mid-1990s, the accelerator was providing electrons up to 5.75 GeV. The 12 GeV Upgrade is a major accelerator project aimed at doubling the energy by adding 10 (five per linac) new high gradient cryomodules, each providing 100 MV of field. The new cryomodule will consist of eight 7-cell superconducting cavities operating at an average accelerating gradient of 19.5 MV/m and with an external Q=3.2 x 10^7. The high gradient, very high quality factor and large Lorentz detuning coefficient (KL up to 4) pose significant challenges beyond what the present analog low level RF (LLRF) control systems can handle reliably; therefore, a new digital LLRF control system has been developed. The main highlights of the new RF Control system include: a RF front-end with low temperature drift and good linearity, a large FPGA

• Research Organization: Thomas Jefferson Lab National Accelerator Facility
• Sponsoring Organization: USDOE
• OSTI ID: 955870
• Report Number(s): JLAB-ACE-08-826; DOE/OR/23177-0381
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
CAVITIES
CEBAF ACCELERATOR
CONTROL SYSTEMS
ELECTRONS
LINEAR ACCELERATORS
QUALITY FACTOR