Log entry time 08:02:58 on April30,2009

Entry number 269926

Owl shift summary: Miha Mihovilovic (SL),  Peter Bradshaw (TO)

                   Eli Piasetzky (3rd)

===================================================================



EVENTS



00:10   Called MCC and asked for 2uA beam with raster (2x2mm)

		We don't know  the correct MCC units so we asked for

		tested following MCC units (3.25 x 3.25MCC)

		

00:20   Called MCC and asled for 2uA beam with raster (6x6)mm.

		In our calculation this is (9.75x9.75) in MCC units.

		



		

00:30   T3 rates for beam with different raster sizes match 

        within 10%. Called MCC and asked for production beam 

        i.e. 6uA with raster (4x4mm) = (6.5 x 6.5 MCC).

        

        

00:42   MCC has problems with beam. It keeps tripping. 



00:44   The ND HV channel L6.3 tripped. Turned the whole

        slot off and on again. It looks normal again. 

     

00:50   Starting a test run before production in order to 

        check raster (4x4), to test rates and to make

        a lumi HV calibration (Xiaoyan). 

       

01:05   HAPPEX DAQ crashed. Experts are trying to resolve the

        problem. 

        

01:08   The ND HV channel L6.4 tripped. Turned the whole

        slot off and on again. It looks normal again.        

        

01:25   Experts are still having problems with the HAPPEX DAQ.

        They report that the ROC 28  has died and that they can

        not reboot it. I have paged Peter (RC) and he suggested

        to page Bryan. We are not taking any production data so

        far.  

        

02:00   Bryan solved the problem with the HAPPEX DAQ and made it 

        running again. 

		

02:37   Experts are adjusting the HV for the LUMI. They need to 

        change the HV for all of the channels since we went from

	1st pass beam to 3rd pass beam. 

		

02:55   Experts have set the HV for the LUMI. Started a new HAPPEX

 	run #31294.

 		

02:58   Start taking production data.



06:15   Almost at the end og the run #1689 the ROC3 crashed. We

	rebooted it. Then we have restarted coda and continued 

	with the data taking.

		

06:45   MCC called and informed us that they will take a beam away 

        for a few minutes because they need to make an optics check. 



07:00   When the beam came back after the OPICS studies we have 

        observed that the beam current was smaller (5.2 uA) than 

        desired. I have called MCC and he told me that they have 

        some problems at the injector and that the beam current 

        will be slowly dropping until injector people come in and

        fix the problem. Run numbers of runs taken during this 

        time are: #1691 and #20584. 

        

07:09   We started new HAPPEX run : #31295



07:42   MCC called and said that they will take a beam away so that 

        they can move the spot. 

	   

RUNS

----



LEFT HRS:

==========================



Runs #1681 - #1684 Spot++ checks

Run  #1685 productions settings but without LUMI and HAPPEX.

	 (Used for the calibration of LUMI HV.)

Runs #1686 - #1691 Production runs





			

RIGHT HRS:

==========================



Runs #20574 - #20577 Spot++ checks

Run  #20578 productions settings but without LUMI and HAPPEX.

	 (Used for the calibration of LUMI HV.)

Runs #20579 - #20584 Production runs