Activities of FNPL from 04/03 - 04/08
                        Friday Apr 08 st, 2005


     
      minutes at: http://nicadd.niu.edu/fnpl/Operation/Minutes/



* Plan for next _10_ days (04/11 - 04/20):

      dedicated to finish plasma experiment {M. Thompson UCLA)
      
      shift plans:
         

* Last week activities
- Monday and Tuesday: 
      	   - work on laser oscillator [Rodion] changed magneto-strictive 
	     motor (used the one from laser acceleration regen). Replace 
	     the motors controller box
	   
- Wednesday and Thursday: took round beam data [Rodion/Philippe]
           - energy spread for single Gaussian UV pulse and 4 stacked pulse, 
	   - bunch length versus charge for 1 and 4 UV pulses
	   - emittance at X3 versus solenoid strength for 1 and 4 UV pulses

- Friday: CTR-based bunch length measurement [Daniel/Rodion]

	   
ACTION ITEM 

H8/ calibration of upstream directional coupler and
    insulator (Markus need to speak to Tim and with Kai to
    schedule this STATUS?)
H13/ Pulse stacker, what do we do? (Rodion, imaging system helped with 
      alignement of pulse stacker)
H21/ the laser uniformity problem can this be due to the new (since
     late summer) tight focusing in the doubling crystal area to
     improve conversion efficiency? On going work [Rodion]
H33/ laser fluctuation since June 1st week [FIXED?]
H34/ Need more work on power supply + devise a way to measure
     the current being put out to the magnet [Jamie]
H39/ streak camera new optics for plasma OTR and UV laser 
     streaking. [Jamie, Greg, Rodion, Philippe] UV works need to test OTR
H41/ OTRI experiment [Greg]
H42/ revisit EO sampling experiment [Jianliang]
H43/ laser cooling system upgrade 
     [on-going work soon completed] [Jamie + water group]
H44/ do we need to get our rf system out of the TeV LCW and Why [Jamie]
H45/ O-scope floppy disk [Jamie]
H46/ dying gun klystron [Tim K.->John Reid, replacement schedule during shutdown]
H47/ dying 200 kW klystron [Tim K.->John Reid] 
     Spare OK -> solenoid power supply [DONE]
H48/ H/V steerer downstream of 9-cell need to be fixed HTV9A-C
H49/ skew quad measurements [Jamie]
H50/ LINAC-type steerers for user beamline [Jamie]
#.50

from Adrian Melissinos:

NEEDED LASER STUDIES:

2. beam profile (wavefront) studies both in IR and UV
   in laser room and on virtual cathode. Use spatial filters
3. study of doubling and quadrupling efficencies with old
   and new crystal, take a tuning curve 

POSSIBLE LASER UPGRADE PROJECTS

1. Measure IR pulse length before compression (use diode?)
   implement cw autocorrelation
2. Install new beamline between multipass and 2-pass --
   install spatial filter, rebalance 2-pass amplifiers
4. _harware_: replacing all coolers with new system IV +
   use existing system III as back-up (see H43)
5. pulse stacker studies, new pulse stacker R&D (see H13)