Activities of FNPL from 01/09 - 01/14
                        Friday Jan 14 th, 2005


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



* Plan for next week:

   - Monday:
	- finish the installation work + alignement
   - Tuesday:
	- run beam to dump + get approval from safety

   - Wednesday, Thursday, Friday: running beam
	- beam to plasma [Matt et al.]
	- do emittance measurement [Philippe + Rodion]    
    
* Last week activities:

- We did not run beam, because of delayed caused by several 
	problems in the UCLA plasma chamber experiment. The 
	UCLA spectrometer was removed from the beamline (along 
	with the lead bricks), the chamber was disconnected from 
	the beamline and work on the plasma source, OTR screen 
	+ alignement was  performed. Final alignement should 
	happen this coming Monday. 

- In parallel the optics for streaking the UV light was modified, 
	and preliminary alignement with the HeNe was done. The 
	modifications were required to allow both the ability to 
	streak the UV and the OTR light coming from UCLA experiement

- The UV remotely controllable iris was installed [Jamie] in the 
	object plane (on the laser table) having for image the cathode. 

- The rebuilt 200 kW klystron was put on-line, but due to outgassing 
	of the cathode, the klystron was never operated to decent 
	filament current. Off line conditioning will have to be done, 
	and once performed we will put back the rebuilt klystron in the 
	system for full tests [J. Reid]

- Visitors from UIUC (G. Gollin + students) came to learn about the 
	BPM system and discuss the installation of the kicker 
	experiment foreseen as soon as UCLA experiment is done.


	
	
ACTION ITEM updated:
Fri Jan 14 17:44:31 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]
H32/ Digital camera from SONY(?): [Philippe/Yin-e]
     to be TESTED with OTR [Sep 27] [FIXED, we have prototype]
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]
H36/ laser room/table vibration studies [Rodion]
H38/ controllable iris [Jamie] DONE
H39/ streak camera new optics for plasma OTR and UV laser 
     streaking. [Jamie, Greg, Rodion, Philippe]
H40/ installation of UIUC experiment, beamline design [Philippe] 
H41/ OTRI experiment [Greg]
H42/ revisit EO sampling experiment [Jianliang]

#.42

from Adrian Melissinos:

NEEDED LASER STUDIES:

1. Study of oscillator bandwidth versus length of
   compressed pulse. Measure IR length using stepping
   autocorrelator [Done week of AUG 23rfd 2004]
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
3. Relay imaging UV from laser room to cave[Done]
4. _harware_: replacing all coolers with new system IV +
   use existing system III as back-up
5. pulse stacker studies, new pulse stacker R&D