Publications
Publication Information
| Title | CEBAF Photo Gun RF System |
| Authors | Tomasz Plawski, Ramakrishna Bachimanchi, Manuel Diaz, C. Higgins, James Hovater, Clyde Mounts, David Seidman |
| JLAB number | JLAB-ACE-18-2840 |
| LANL number | (None) |
| Other number | DOE/OR/23177-4565 |
| Document Type(s) | (Meeting) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
|
Meeting Paper compiled for LINAC2018 Proceedings Proceedings of LINAC 2018 Edited By Volker R.W. Schaa, Guoxi Pei, Yong Ho Chin, Shinian Fu, Ning Zhao JACOW (2019) Page(s) 236 | |
| Publication Abstract: | During the CEBAF 12 GeV Upgrade at Jefferson Lab, a fourth experimental hall, ?D?, was added to the existing three halls. To produce four beams and deliver them to all halls concurrently requires new frequencies and a new timing pattern of the electron bunches. Since a photo-gun is used to produce electron bunches, the gun?s drive laser pulses need to be synchronized with the required bunch rate frequencies of 499 MHz or 249.5 MHz. To meet these new operational requirements, the new LLRF system has been proposed. Very specific requirements (dual frequency operation) on one side and the simple RF drive mode operation on the other imply the use of a commercial off-the-shelf digital platform rather than a system typical for RF cavity field control. We have chosen the Texas Instruments FPGA board along with a high-speed 8-Channel, 14-Bit board, and a 4-Channel, 16-Bit board. The DAC board includes the clock generator for clocking ADCs, DACs and the FPGA. The only custom design section of the system is the RF Front End board. The complete Gun Laser LLRF system has been designed, built, and recently commissioned in the CEBAF Injector. This paper will detail the design and report on commissioning activities. |
| Experiment Numbers: | other |
| Group: | EES RF Systems |
| Document: | |
| DOI: | https://doi.org/10.18429/JACoW-LINAC2018-MOPO115 |
| Accepted Manuscript: | mopo115.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |