Minutes of A0 photoinjector (local) meeting
		        Friday Feb 13th, 2004


* Next meeting: Friday February 20th 4pm in "the Motel"

* Plan for next week: 

-Monday:    - morning: laser work (if sork stated Friday not 
              finished) otherwise do some streak camera 
	      measurement [Rodion + Philippe if streak cam.]
            - afternoon: tune-up beamline for propagating beam 
	      up to the dump [Markus]
-Tuesday:   - morning: dump test plan [Garry + Markus]
            - afternoon: Start installation of Matt's Spectrometer 
              [Matt/Wade et al.]
-Wednesday: - morning: continue installation
            - afternoon: round beam studies [Philippe + Kai]
-Thursday:  - morning: round beam studies [Kai + Philippe]
            - afternoon: Plasma [Matt et al.]
-Friday:    - Plasma [Matt et al.]


Discussions:

* Achievements of last week:

- Monday:
        -  rf-gun steering [Philippe]. More data were taken, 
           and a preliminary analysis indicate that though the 
           observation are different from what we used to observe 
           they seem to be consistent (in a qualitative way) with 
           simulations. 
	-  Some problem with the 9-cell prevented us to run the 
           beam up to the spectrometer.
	   
- Tuesday: 
        -  cave open, the straight ahead dump was moved per the 
           Safety people request, and work was done on Matt's 
           experiment (a feedthrough was changed) [Wade et al.]
	-  laser work [Rodion]: the beam was resteered to try 
           to avoid a burn mark in the IR-to-green doubling crystal 
           this did not improve the beam quality though.   
           
- Wednesday: 
        -  worked with Safety people to test the radioactivity level 
           with the newly configurated dump [Markus, Kai, + Garry] 
           resulting in more lead added on the new beamline [Wade et al.]
	-  More data were taken on the 9-cell phase slow variation 
           and a clear correlation with the 9-cell tune was observed 
           a slow feedback to maintain the 9-cell phase constant was 
           set-up using an octave script [Markus]
	   
- Thursday: 
        -  Beam spot measurements [Kai+ Jamie]: no report/analysis 
           of what conditions were measured yet.
	-  Plasma [Matt + Nick + Jamie R.]: a quadrupole scan 
           was attempted downstream of the plasma aluminum window  
           and showed an emittance of about 60 mm-mrad consistent 
           with expectation. This type of emittance should allow 
           the beam to be refocused to a tight enough beam for 
           Matt's experiment. There was also some work on the 
           plasma source trigger. 

- Friday
        -  Beam spot measurements [Kai+ Jamie]: no report/analysis 
           of what conditions were measured yet.
        -  run plasma experiment, work on triggering of the plasma 
           source
	 
        -----------------------------------------

* Tasks concerning hardware 

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?  CRYSTALS FROM CASIX ORDERED (FEB-04, 2004)
     (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 and 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, RECEIVED A FIRST VERSION JAN-30, 2004)