run control = 50

run data = /onlineNEDA_00/xData/hil099/run_0050_09-03-2023_00h50m28s/needleRU_i50_0050_0028.caendat

RU =  7.15 MB/s

LF =   3.68 MB/s

plunger:

plunger run = 779

actual distance =  533.1 um

supposed distance = 532.7 um

micrometer =   533.4 um

position =  299.6 um

voltage =  1.66 V

Beam dump: 1-1.5 enA (oscillating)

Colimator :  0.6 enA

run control = 50

run data = /onlineNEDA_00/xData/hil099/run_0050_09-03-2023_00h50m28s/needleRU_i50_0050_0035.caendat

RU =  7.39 MB/s

LF =   3.60 MB/s

plunger:

plunger run = 790

actual distance =  532.8 um

supposed distance = 532.7 um

micrometer =   533.6 um

position =  300.1 um

voltage =  1.657 V

Beam dump: 1-1.5 enA (oscillating)

Colimator :  0.6 enA

run control = 50

run data = /onlineNEDA_00/xData/hil099/run_0050_09-03-2023_00h50m28s/needleRU_i50_0050_0042.caendat

RU =  7.20 MB/s

LF =   3.54 MB/s

plunger:

plunger run = 801

actual distance =  533.2 um

supposed distance = 532.7 um

micrometer =   533.6 um

position =  300.7 um

voltage =  1.66 V

Beam dump: 1-1.5 enA (oscillating)

Colimator :  0.6 enA

Ge rates increasing, similar to what it was 24h before. Asking to decrease beam intensity by a factor of 2.

Attached Ge spectra before decreasing.
 

Before decreas beam current was 1.75enA, afterwards 1.1enA.

Count rates are still a bit high (~2.6kHz for EAGLE det4). Ge spectra looks fine compared to earlier ones.

Ge spectra after #161 - #162 beam tuning.

From 13:00 the rate of the Ge [the chanel 4] is a bit higher (~2.15 kHz). And also the rate of other detectors.

the rates of detectors are still a bit higher

Notes of the measurements with different conditions are attached.

Conclusion:
What is read out by the operators on the blue cable should be multiplied by 7 to get a real value in enA.

at 11:34:50 sek on 11 march a spike in counting rate of some Ge detectors is observed. Buffers not cleared properly?

Issue described in #61 continues to persist.

Beam stopped from 19:20 to 19:32, run 36 ongoing; MP, GJ, BS entering the experimental hall. 

They changed the position of the grounding point on the chamber, moving it downstream after a fitting/joining part (A to B on the attached picture [artist: GJ]).

Current readout issues from beamdump. Beam stopped from 17:46-17:52, run 36 ongoing.

MP & GJ checking the grounding and connection the beamdump readout. No visible issue found in the exp hall, but copper grounding wire was tightened, which seemingly resolved the issue (stability of beamdump readout).   

no beam in 15:52 - 16:21 due to power supply problem

Again beam intensity gradually increased reaching 2.4 kHz ontotal rate EAGLE_0 ch4.  Beam intensity reduction requested. 1.8 kHz on ch4 after reduction.

Again beam intensity to high. Reduced to 2 kHz on ch4 GE

14:12 beam intensity instability. Rapid increase of beam intensity - twice the previous value. Returned to normal after 4 minutes.

Large beam intensity instabilities from 14:10 till 14:40.  Beam intensity reduction requested. CH4 on Total rate EAGLE_0 returned to 1.9kHz. Intensity became stable.