00:38
Intensity in the ring dropped by 2 orders of magnitude to 5e5 on injection

Lost rutherford rate (as seen in last e-log post)
All pressures seem fine

00:48
Called main control room, said they will take a look

00:59
Servo motor control restarted and homed

01:11
Ion source is confirmed to be off
Zoran will try and fix it, should take 1hr or so and not guaranteed to work.

00:30
Pressure in S1 slightly decreased from before but still high enough to measure data.
One new count at 20MeV

Target density at S1: 2e-8 - 2.7e-8
Pressures OK (one small spike just before 00:00 in YR08)
System Checks OK
White rabbit fail diff: 49
Data write speed: ~1.4Mb/s
Beam intensity at injection: ~7.7e7
Cryo Temp Setpoint: 110K

(Beam intensity in ring dropped as I was writing which is why there is no rutherford peak on exRate image)
 

Ring current 6.67e7 particles/s

pressure at S1: 2.3-2.8e-8

Merger, Tape server (WS3): 1574 kB/s, writing ok

Leakage current (WS4): 3.20 uA

DAQ (WS2): temperature checked, clock status: ok, adc calibration: ok, white rabbit check: failed

Online monitoring (WS 5): done

no change:

Check Clock Status': Passed 5, Failed 0

Check ADC Calibration: Passed 5, Failed 0

'Check the White rabbit decoder status: Passed 0, Failed 5

target density at S1: 2.2-2.7e-8

temp: 110K

beam at injection: 7e7

no change:

Check Clock Status': Passed 5, Failed 0

Check ADC Calibration: Passed 5, Failed 0

'Check the White rabbit decoder status: Passed 0, Failed 5

target density at S1: 2.3-2.7e-8

temp: 110K

beam at injection: 7e7

A target temperature walkthrough has been initiated at 20:41 since the target density at S1 had slightly decreased (with ~0.1-0.2)

Current temprature 116K

set to 126K at 20:41

set to 95K at 20:47:30

set to 108.5K at 21:01:30, at this temperature was a sweetspot observerd for target density.

set to 109.7 at 21:08:30

set to 110K at 21:13:30 - we keep at this value for a while. the values at S1 are changing between 2.2-2.9e-8

no change:

Check Clock Status': Passed 5, Failed 0

Check ADC Calibration: Passed 5, Failed 0

'Check the White rabbit decoder status: Passed 0, Failed 5

target density at S1: 2.1-2.3e-8

temp: 116K

beam at injection: 7e7

no change:

Check Clock Status': Passed 5, Failed 0

Check ADC Calibration: Passed 5, Failed 0

'Check the White rabbit decoder status: Passed 0, Failed 5

target density at S1: 2.1-2.4e-8

temp: 116K

no change:

Check Clock Status': Passed 5, Failed 0

Check ADC Calibration: Passed 5, Failed 0

'Check the White rabbit decoder status: Passed 0, Failed 5

target density at S1: 2.1-2.4e-8

temp: 116K

Beam issues due to too long storage time in the last hours. Motors moved out and not moving.

Decreased storage time to 70 s. Seems OK now. Restarted motor movement as before

Started new run R86

'Check Clock Status', 'Check ADC Calibration' and 'Check the White rabbit decoder status' : no change

New run R84

Attempting to sync pneumatic movement with ring. Still see something on t out -> p out

Command to move out was being given relative to the wrong time.

Fixed it. Still see one-two events every time we move out around 4-6 MeV. Attempted to greatly increase time before next injection - no difference. Microphonics from moving the detectors? It's just one-two counts on entire detector, acceptable.

New run R85

Now moving in/out

Potentiometer: 23.10 mm to 67.19 mm

'Check Clock Status', 'Check ADC Calibration' and 'Check the White rabbit decoder status': no change

'Check Clock Status', 'Check ADC Calibration' and 'Check the White rabbit decoder status': same

old potentiometer position 19.1 mm

new run number: 83

new potentiometer position : 27.58 mm

'Check Clock Status', 'Check ADC Calibration' and 'Check the White rabbit decoder status' - no changes

detector motors are still out

'Check Clock Status', 'Check ADC Calibration' : Clock status test result: Passed 5, Failed 0

'Check the White rabbit decoder status' :  
         Base         Current     Difference
aida01 fault      0xab60 :      0xab8f :      47  
aida02 fault      0x88d3 :      0x8901 :      46  
aida03 fault      0x23aa :      0x23d9 :      47  
aida04 fault      0x15d7 :      0x1606 :      47  
aida05 fault      0x2f03 :      0x2f0f :      12  
White Rabbit error counter test result: Passed 0, Failed 5

Understand the status reports as follows:-
Status bit 3 : White Rabbit decoder detected an error in the received data
Status bit 2 : Firmware registered WR error, no reload of Timestamp
Status bit 0 : White Rabbit decoder reports uncertain of Timestamp information from WR

just FYI: current positions saved in files are x=1000 and y=-750. this information is good in case of crash.

06:20

Servo motors moved to fully out position as some work on the beam was neccessary. Beam injection had dropped from ~9e7 to around 1e7. Potentiometer reads 19.10 mm.   

Still trying to improve target density. Current setpoint 100 K.

Merger OK

Data rate = 1600 kb/sec

Leakage current = 3.21 uA

System checks OK - wr fails

         Base         Current     Difference
aida01 fault      0xab60 :      0xab8e :      46  
aida02 fault      0x88d3 :      0x8900 :      45  
aida03 fault      0x23aa :      0x23d8 :      46  
aida04 fault      0x15d7 :      0x1605 :      46  
aida05 fault      0x2f03 :      0x2f0f :      12  
White Rabbit error counter test result: Passed 0, Failed 5

Understand the status reports as follows:-
Status bit 3 : White Rabbit decoder detected an error in the received data
Status bit 2 : Firmware registered WR error, no reload of Timestamp
Status bit 0 : White Rabbit decoder reports uncertain of Timestamp information from WR

Avg ring pressure = 4.3E-10 mbar.

06:40

Target density still very low. Setpoint back to 116 K. Detectors still fully out, very low rutherford rate.

Attempted to move nozzle to increase density, already on maximum point. 

06:50

Setpoint to 95 k. Small increase in target density, however this was temporary

Have been unable to achieve decent target density with temperature cycling so far. Will attempt to go up to 300 k and back down to around 115 k which proved successful in previous shifts.