Activities of FNPL from 03/07 - 03/11
                        Friday Mar 11 th, 2005


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



* Plan for next week (03/14 - 03/18):

	Monday/Tuesday: 
	         - vacuum work bunch compressor is re-intalled [Wade et al.]
                 - work on the 200 kW solenoid power supply [John Reid et al.]
		 
	Wednesday: 
                 - round beam / bunch compression[Rodion]

	Thursday:          
                 - round beam / bunch compression[Rodion/Daniel]

	Friday: 
                 - round beam / bunch compression[Rodion/Daniel]

* Last week activities
- Monday and Tuesday: the spare (rebuilt) 200 kW klystron was installed 
  and commissioned (john reid et al.). The klystron trips every couple 
  of hour but comes back without problem. 
  The save/restore file for the RF were updated for the new klystron (Philippe)
- Wednesday: took some data on the five beamlet experiments [Philippe/Jianliang]  
- Thursday: tried to take a set of flat beam data [Philippe] but due to laser 
  did not succeed: the laser CW autocorrelation looked abnormal (many 
  ripple on it) and later in the day the UV pulse length was measured to 
  be long (20 ps) [Jianliang]. Some work on the grating was done and the 
  laser pulse length of 6 ps (FWHM) was recovered
- Friday: took a set of flat beam data. 


ACTION ITEM 
updated: Mon Mar 14 08:45:52 CST 2005

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)
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
H40/ installation of UIUC experiment, beamline design [Philippe] 
H41/ OTRI experiment [Greg]
H42/ revisit EO sampling experiment [Jianliang]
H43/ laser cooling system upgrade 
     [on-going work soon completed]
H44/ do we need to get our rf system out of the TeV LCW and Why [Jamie/Philippe]
H45/ O-scope floppy disk [Jamie]
H46/ dying gun klystron [Tim K.->John Reid]
H47/ dying 200 kW klystron [Tim K.->John Reid] Spare OK -> solenoid power supply
H48/ H/V steerer downstream of 9-cell need to be fixed HTV9A-C
#.47

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)