07.00 

JG found target off (target data stopped c. 02.30 this morning) and beam off (not re-enabled from previous CRYRNG area entry - target related?) JG re-enables beam 

07.37 

Run R5 stopped Run R6 started - switch to no storage mode 

07.44 

DSSSD bias and leakage currents - attachments 1 
FEE64 Rate spectra OK - attachment 2 
ADC data item stats OK - attachment 3 
FEE64 temps OK - attachment 4 
WR timestamps OK - attachment 5 
Merger and Tape Server - attachments 6 
DSSSD x-y hit patterns - attachment 8 
Per JM instructions will move detectors toward beam axis by 30mm and investigate effect of e-target scrapers 

08.45 

Run R7 JG has setup e-target scrapers (YR09DS1HA and YR09DS1HI) both scrapers are set to move with the beam cycle. They move in with the start of the 'target' period 
(SC3). They move out with the start of the 'intermediate' period (SC4). The movement is rather slow (~1sec) so there is still some unblocked time during 'target' period. 
The positions are YR09DS1HA (outside): 10mm (SC3) and 30mm (SC4) YR09DS1HI (inside): -0.5mm (SC3) and -20mm (SC4) 


11:50 

Jan has been playing with the scraper settings so that we can take a run with the scrapers  and without. 

Since he has been playing. We see the beam halo. This is when scrapers were in and beam was moved to the inside of the ring by 5mm. See attachment 10

Moving the beam to the putside of the ring by 5mm we see halo on the left now. See attachment 11

We believe this is scattering from the edge of the scrapers. See attachment 12 for the energy spectrum which corresponds to attachment 11. It is consistent with 
scattering.

We will now take a run with and without the scrapers in and with the left detector moving in with every cycle via the pneumatic motor.  

12:20 

R8 started. Scrapers in. Left arm moving in synchronous with the ring cycle, potentiometer when IN = 62.71 mm. Right arm stationary and OUT, potentiometer = 19.8 mm

13:00

Run 9 started. Same condition as run 8 except no scrapers.

13:35 

Run 9 stopped, R10 started -> no storage 

13.37 Merger - attachment 13

      per FEE64 n+n Ohmic 1.8.W spectra - 20us, 200us, 2ms, 20ms FSR - attachments 14-18
      per FEE64 p+n junction 1.8.W spectra - 20ms, 2ms, 200us, 20us FSR - attachments 19-22

      per FEE64 Rate spectra - attachment 23

      WR timestamp OK - attachment 24

      ADC, DISC, PAUSE  RESUME data item stats - attachment 25-28

      FEE64 temps OK - attachment 29

      DSSSD bias & leakage current OK - attachment 30


14:00

R11 Pulser walkthrough 
    See attachments 31-32

Following pulser walkthrough R12 started with no beam and no target in the ring. Cave is accessible while we switch to 7Li

20:15

System checks OK