| Title |
A Slow RF-Laser Feedback for PHIL Photoinjector |
| Authors |
- N. ElKamchi, V. Chaumat, V. Soskov
LAL, Orsay, France
|
| Abstract |
PHIL is an electron beam accelerator at LAL. It produces low energy (E<5 MeV) and high current (1 nC/bunch) electrons bunch at a repetition frequency of 5Hz. The stability of the beam charge at PHIL is a key issue for the succeful operation of the physic experiences that use the machine. At PHIL, the beam charge is quite stable, but we often note a slow charge drift on long duration experiences. Two ICTs, and a back-end electronics are used to monitor the stability of the beam charge, with an accuracy of about 1pC. Several types of jitter can impact the stability of the beam charge. The fluctuations of the RF power or the RF-laser relative phase drift could have significant influence, due to temperature variations that produce cables dilataion, and electronic components overheating. To correct the phase drift, we describe a method based on a slow analog-digital feedback loop between the RF wave in the gun (3 GHz) and the synchronisation signal of the laser (75MHz). It allows to maintain the jitter between the laser pulse and the RF wave stable at a very low value. As a result, the electron beam charge is maintained at a stable level, to meet the requirements of the users.
|
| Paper |
download MOPHA006.PDF [0.555 MB / 3 pages] |
| Export |
download ※ BibTeX
※ LaTeX
※ Text/Word
※ RIS
※ EndNote |
| Conference |
IPAC2015, Richmond, VA, USA |
| Series |
International Particle Accelerator Conference (6th) |
| Proceedings |
Link to full IPAC2015 Proccedings |
| Session |
Monday Posters (Harrison) |
| Date |
04-May-15 16:00–18:00 |
| Main Classification |
6: Beam Instrumentation, Controls, Feedback, and Operational Aspects |
| Sub Classification |
T24 - Timing and Synchronization |
| Keywords |
laser, feedback, gun, electron, controls |
| Publisher |
JACoW, Geneva, Switzerland |
| Editors |
Stuart Henderson (ANL, Argonne, IL, USA); Evelyn Akers (Jlab, Newport News, VA, USA); Todd Satogata (JLab, Newport News, VA, USA); Volker R.W. Schaa (GSI, Darmstadt, Germany) |
| ISBN |
978-3-95450-168-7 |
| Published |
June 2015 |
| Copyright |
|
