Laser beam plan Electron beam planning meeting 05
Laser beam plan Electron beam planning meeting 05 January 2018
Issue: Laser beam stability Stiffness of Al profiles is not sufficient Periodic movement of laser beam were transferred to the UV laser beam on cathode from cables attached to one of these bars 300 135 55 150 Doubl e-T 100 x 10 0 6 3 124 740 Tube 120 mm diameter Bottom Plate 820 x 400 x 5 Fixed from below 210 250 Replacement of these profiles by more solid structure would require too dismounting of whole structure, including neighbouring shelves. Almost impossible due to the many cables (power, signals, Ethernet) installed around. Options: 1. To anchor Al profiles to the sealing above. 2. To anchor Al profiles to the optical table below
Some photos Two anchoring pillars (ITEM 40 x 80) can be installed here
Laser beam optics optimization • Prepare UV beam expander for making beam size larger on the cathode. • Reduce beam losses for energy measurements, reflections • Increase the IR pulse energy available for THG • Why the UV energy in fluctuating so much (+/- 20%) ? • Installing UV sensor at the virtual camera
Laser beam control works • Implementation of 12 -channel Standa controller: • • Remote control of 2 Standa mounts in the IR => UV beam path Motorized rotator for UV beam attenuation Standa mount in the reference beam to the streak camera Work on FESA class by Lab. View experts from EN-SMM (new) group • Resolving energy measurements issues • Enable simultaneous readout of 5 E-meters • Finding solution for S-Link E-meter problem
Maintenance of laser shutters and dumps • Dismount and check LSSP 2 (Procedure in EDMS 1743000 ) • • Lock out of laser system Neutralisation of EIS (out of chain request) Venting vacuum line between compressor and merging vessel Dismount actuator and check the beam block fixation • Exchange of foils in LBDP 2 and LBDP 3 (? ) Provisional period: End of January - 1 st week of February
- Slides: 6