Laser news AWAKE performance meeting 25.11.2013

1. Laser newsAWAKE performance meeting25.11.2013

2. Overview • There was a meeting on 05.11.2013 with the supplier of the laser system (AMPLITUDE) • No new information on the laser system yet • The placement of the optical compressor and the focusing telescope has to be defined before drilling the connection tunnel • Availability of vacuum components for the compressor and telescope is under study. • 10-6Torr “easily” achievable. Pellicle or differential pumping as an option to go better • Provocative: is 10-8Torr overestimated?

3. Some measurements of laser room with respect to merging point

4. Laser dedicated list of “Things to Do”: Laser Installation

5. AWAKE access will be discussed preliminary on the dedicated meeting Courtesy of C.Hessler Preliminary

6. Laser dedicated list of “Things to Do”: Laser Operation

7. Alignment of 3 beams • OTR or laser light • Imaging (lens system and CCD) • Capture and measure with PhD or streak-camera (coupling to a fiber or lens system) • Other techniques laser-beam p-beam BPM BPM plasma e-beam

8. Alignment of 3 beams • 3 beams (protons, electrons and laser) have to be align in space and time • Transverse accuracy ~ 0.2mm • Angular accuracy ~ 0.2mm / 10 m = 20rad • Timing electrons-laser ~ 100fs – alignment by response? Rough alignment is needed anyway • Timing protons-laser ~ 10ps – alignment with fast PhD and scope possible, 1pJ of light is required. Streak-camera. For robust alignment of 3 beams we need an optical signal which comes from the same screen sensitive to 3 beams (the power of laser beam can be reduced for the measurements not to damage the screen)

9. Thank you