Minutes of A0 photoinjector (local) meeting
		        Friday Jan 23rd, 2004


* Next meeting: Friday January 30th 4pm in "the Motel"

* Plan for next week: 

-Monday:    Laser studies (Rodion/Jamie)
            Adrian suggested checking alignement onf the laser in the 
	    transport line, to see whether the beam is not missing one 
	    of the mirror (beam looks awfull (=structured) on virtual 
	    cathode and so is the e- beam)
-Tuesday:   CTR studies (Daniel)
            studies bunch length for different settings of the chicane 
	    and 9-cell phased
-Wednesday: Beam studies [gun] (Philippe/ Jason) 
-Thursday:  CTR studies (Daniel)
            continue studies of Tuesday
-Friday:    Beam studies [9-cell?] (Philippe)

Discussions:

* Achievements of last week:

- Monday,
	-  impact of laser on electron beam was studied for various 
	   settings of doubling crystal orientation. Strong distortions 
	   of e- beam on X8 and XS3 were observed depending on crystals 
	   setttings (Rodion + Philippe).
	-  [bad] event during our studies, X3 slits fell into the beamline (screws 
	   unscrewed themself dues to vibrations...)
	   
- Tuesday: 
        -  cave open for finishsing installation of plasma experiment (Matt/Jamie)
        -  vacuum work on X3 to fix Monday event (Wade/Mike/Rocky)
           
- Wednesday: 
        -  North cave was running which prevented us from running the 
           9-cell. The gun was ran and some gun studies (phase scan versus 
	   peak field in the gun + coupler kick) were done (Philippe)

- Thursday: 
        - (morning) radiation safety commissionned the beam dump (Gary/Jamie.Matt)
	  PS: WE WERE (AND ARE) NOT ALLOWED TO RUN MORE THAN 1 BUNCH IN THE STRAIGHT 
	  AHEAD DUMP
        - (afternoon) beam through plasma chamber (Matt/Philippe) with rather good 
          charge transmission (3 nC) in the chamber but 30% transmission from 
	  photocathode (9 nC) to entrance of plasma chamber (3 nC) -- compressor 
	  was off. 

- Friday
        - continue on optimizing transport through the plasma chamber, compressor 
          was turned on and transmission was greatly improved compared to 
	  Thursday night (Matt/Jamie). An attempt to turn on the plasma was done, 
	  but a failur of a feedthrough prevented to continue the Matt's experiment 
	  (vacuum work will be needed)
	
	 
        -----------------------------------------

* Tasks concerning hardware 

H2/ Corrector HTBX06, Jamie
     Steerer from UCLA here, will be installed MONDAY JAN 26
H8/ calibration of upstream directional coupler and 
    insulator (Markus need to speak to Tim and with Kai to  
    schedule this STATUS?)
H11/ Some of the toroid need cabling to have signal available 
     out of the cave in the reack area
     (JAMIE, STATUS?)
H13/ Pulse stacker, what do we do? 
     (Rodion)
H14/ air coil steerers, Kai will gather all the paper he has 
     and we will decide whether we can give this project to one of 
     the NIU engineering student
     (Kai, STATUS: nobody at NIU picked up this project...)
H20/ what shall we do with the burnt doubling crystal? Who will 
     specify + order it? 
     (Nick, Rodion and Adrian should discuss next week)	 
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 efficency?    			 
     (Rodion/Adrian: Rodion will design a procure a new 4*omega
      beamline parallel to the present one)
H22/ Radiation shielding test: precise plan on what to do and when
     (Kai + Lautenschlager)    				 
H23/ laser spare components list
     (Jamie)