Difference between revisions of "BriansRanLogbook"
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| Line 29: | Line 29: | ||
High Voltage: 1500V | High Voltage: 1500V | ||
| − | Disc Thresh:0.588V | + | run 7343 Disc Thresh:0.588V |
| − | Disc Thresh: 0.500V | + | run 7345 Disc Thresh: 0.500V |
| − | Disc Thresh: 0.425V | + | run 7346,7347 Disc Thresh: 0.425V |
| − | Disc Thresh: 0.351V | + | run 7348, Disc Thresh: 0.351V |
| − | Disc Thresh: 0.306V | + | run 7351 Disc Thresh: 0.306V |
=He3 Tube = | =He3 Tube = | ||
Revision as of 21:10, 3 May 2023
This is where I write down what I'm doing
1/13/23 : Turned on HpGe HV to 1500 and learned about analog to digital signal processing
detected signal rate -vs- HpGe Voltage
HpGe Detector
| High Voltage (V) | Counts (with source) | Counts (no source) |
|---|---|---|
| 1492.67 | 1532.5 ± 36.67 | 167.5 ± 7.78 |
| 799.15 | 1336.5 ± 2.12 | 149.4 ± 34.65 |
| 396.83 | 1193.5 ± 54.48 | 127.5 ± 7.78 |
| 197.19 | 1035.5 ± 40.31 | 121 ± 4.24 |
| 4.88 | 562.5 ± 2.12 | 332 ± 35.36 |
05/02/2023 Amplifier Course Gain: 2 High Voltage: 1500V
run 7343 Disc Thresh:0.588V
run 7345 Disc Thresh: 0.500V
run 7346,7347 Disc Thresh: 0.425V
run 7348, Disc Thresh: 0.351V
run 7351 Disc Thresh: 0.306V
He3 Tube
1/27/23 : Turned on He3 detector, adjusted to find counts with Cf source in containment and out of containment
2/3/23 : Same as 1/27, adjusting discriminator voltage and recording counts with Cf-252 source. Encountered strange effects of higher counts with source away at low QD voltage. Sets of measurements notably inconsistent.
| Discriminator Voltage (V) | Counts/10s (no source) | Counts/10s (with source) |
|---|---|---|
| 2.003 | 4.4 ± 1.67 | 97.0 ± 8.49 |
| 1.788 | 4.8 ± 1.09 | 108.2 ± 10.89 |
| 1.503 | 5.4 ± 2.22 | 105.7 ± 8.63 |
| 1.227 | 7.9 ± 3.14 | 109.8 ± 9.34 |
| 1.009 | 89.9 ± 7.87 | 234.1 ± 20.06 |
| 0.799 | 2656 ± 251.1 | 2447 ± 183.0 |
| 0.485 | 55479 ± 1325 | 48360 ± 1938 |
2/10/23 Same procedure as 2/3/23, just changing HV applied to He3 detector to values of 1300V then 1100V.
| Discriminator Voltage (V) | Counts/10s (no source) | Counts/10s (with source) |
|---|---|---|
| 1.971 | 4.6 ± 2.37 | 107.7 ± 13.17 |
| 1.775 | 7.7 ± 2.11 | 100 ± 10.70 |
| 1.486 | 5.5 ± 2.32 | 104.8 ± 12.79 |
| 1.248 | 4.7 ± 2.00 | 99.6 ± 7.09 |
| 1.013 | 75.2 ± 12.17 | 171 ± 12.82 |
| 0.762 | 3074 ± 143.0 | 2833 ± 894.7 |
| 0.509 | 19658 ± 424.6 | 40290 ± 2402 |
| Discriminator Voltage (V) | Counts/10s (no source) | Counts/10s (with source) |
|---|---|---|
| 1.971 | 5.4 ± 1.78 | 111.3 ± 9.97 |
| 1.773 | 5.3 ± 1.89 | 97.3 ± 7.70 |
| 1.524 | 7.1 ± 4.51 | 99.7 ± 11.78 |
| 1.275 | 12.2 ± 3.55 | 117.3 ± 23.11 |
| 0.993 | 177.7 ± 8.18 | 351.9 ± 28.71 |
| 0.784 | 2691.2 ± 114.7 | 2763.7 ± 126.2 |
| 0.485 | 50346 ± 3831 | 53920 ± 4354 |
03/31/2023
- Analyzed the plateau graphs.
- Began taking plateau measurements between a discriminator voltage range of about 1.000V and 1.250V to determine where the noise is cut from the signal.
- Got abnormal fluctuations in counts.
04/04/2023
- Worked with Dr. Forest to tune the He3 detector such that the peak height of the signal could be read by the computer.
- Set up the computer to read from the peak sensing ADC and start taking measurements.
- Started a background measurement to run overnight.
04/05/2023
- Ended the background measurement.
- Took a new measurement, this time with source out.
04/07/2023
- Worked with Dr. Forest to graph the two measurements and to create a graph of the source out measurement minus the background measurement.
- Began re-tuning the detector in order to repeat the process once more.
04/11/2023
- Finished tuning the detector and took another source out measurement. The discriminator threshold this time was at 3.660V.
- Completed a second background measurement.
04/12/2023
- Started a new plateau measurement by taking a measurement with the source out and viewing the graph in root.
- Since the He3 detector was readjusted the new point where noise is cut from the signal has shifted, after some measurements it was determined to now be somewhere between 1.900 and 2.000 instead of the window from 03/31/2023.
- Took a source out measurement at a discriminator threshold 1.900V.
04/18/2023
- Before starting measurements the GUI displayed an error "Lost Connection to the Platform." Had to restart the process.
- After adjusting the discriminator threshold to 1.927V and taking a source out measurement, the data file produced no results when graphing the data in ROOT. Was unable to determine the reason for this. It's possible the width of the logic pulse was accidentally adjusted while while changing the disc voltage or that some adjustment was made to their position so that the computer does not have enough time to read out the measurement. Will check the detector is correctly adjusted and ask Dr. Forest when he returns if that is not the problem.
04/19/2023
- Was unable to determine the reason that the data file was reading out incorrectly. Will have to wait for Dr. Forest to help understand and fix the problem.
- Attempted to start creating background subtracted graphs in ROOT for the measurements already taken.
04/20/2023
- Finished the background subtracted graphs.
- Looked at the peak sensing ADC one more time without success.
Background subtracted graph for discriminator threshold 3.114V
Background subtracted graph for discriminator threshold 3.660V
