| 1999 | ||||||||||||
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| 2001 |
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
| 1 | 2 | |||||
| 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| 24 | 25 | 26 | 27 | 28 | 29 | 30 |
Test of the ion source #3 and charge exchange effect
1. Pierce now 3/32", Extractor 6.2mm. No charge exchange found
| P | E | A | I_filament | I_shutter | size at BPM | BPM offset | BPM peak | I_Pierce | Note |
| 45.7kV | 38.2kV | 17kV | 6A | 20uA/4-5 | 6mm | 0.4uA | 0.4uA | ? | 100MOhm on 'E' |
| " | 37.6kV | 18.8kV | 6.5A | 60uA/4-5 | 10mm | 35uA | 10uA | 76uA | " |
| " | 37kV | 16.8kV | 7A | " | " | ||||
| " | " | 16.2kV | 8A | 120uA/4-5 | 20mm | 80uA | 20uA | 173uA | " |
| " | 37.6kV | 19.4kV | 6.2A | 27uA | 20mm | 50uA | 15uA | 106uA | 200MOhm on 'E' |
| 70.6kV | 63.4kV | 44kV | 6.2A | 130uA/4-5 | 8mm | 10uA | 25uA | 75uA | " |
| " | 63.6kV | 45.4kV | 6.5A | 150uA/4-5 | 10mm | 11uA | 32uA | 90uA | " |
| " | 63.2kV | 45.4kV | 6.8A | 36uA | 12mm | 50uA | 15uA | 106uA | " |
2. Change the Pierce hole to 3.0mm, extractor hole to 4.55mm. The purpose is to increase the beam current while shrink the size of the beam. No charge exchange found.
| P | E | A | Filament | Shutter | sizeBPM | BPMoffset | BPMpeak | I_Pierce | Note |
| 60kV | 53.6kV | 34.8kV | 7A | 200uA/4-5 | 10mm | 25uA | 30uA | 158uA | 200MOhm 'E' |
| 70kV | 63kV | 43kV | 7A | 240uA/4-5 | 9mm | 20uA | 40uA | 179uA | " |
1. Repeat yesterday's test at 60keV. Get ~ 25uA on the shutter with bias. 120uA/4-5 w/o bias. (worse?)
2. Detect the beam on the 'T10' plates, to compare with those signals on the shutter for later reference.
3. Change ion source to #5, preparing for the MST clean-run. Start to emit at 6.8A. I_shutter = 6-15uA w/o bias.
A quick test of the ion source #5. At I_filament 7.1A.
45keV, I_shutter = 42uA/4-5
50keV, I_shutter = 50uA/4-5
60keV, I_shutter = 55uA/4-5
70keV, I_shutter = 55-60uA/4-5
1. MST maintanence and meeting
2. Change the primary turbo oil
3. Change the analyzer turbo pump.
1. Test of ion source #5
| Vp (kV) | Ve (kV) | Va (kV) | Ib w/bias | Ib w/o bias | I fila (A) | Vbias (V) | I pierce(uA) |
| 45 | 41 | 30.56 | 3.2 u | 12u | 6.7 | 10.48 | 19 |
| 45 | 41.2 | 30.48 | 4.1u | 18u | 6.8 | 15.21 | 22 |
| 45 | 41.3 | 30.48 | 6.3u | 24u | 6.9 | 25.6 | 26 |
| 45 | 41.5 | 30.86 | 10u | 42u | 7.0 | 38.8 | 32 |
| 45 | 41.6 | 30.94 | 14.6u | 75u | 7.1 | 58 | 45 |
| 45 | 41.4 | 32.02 | 18u | 95u | 7.15 | 73 | 55 |
| 45 | 41.4 | 31.56 | 22u | 105u | 7.2 | 85 | 66 |
| 45 | 41.4 | 31.56 | 22.5u | 110u | 7.25 | 90 | 74 |
2. Try 50 kV beam energy, get 140 - 150 uA w/o bias
3. The filament was broken at ~ 8 A, stop here
4. Change ion source to # 4
1. Test of #4 ion source
2. Starts emission at 3.4A. Ib ~ 1nA
3. End at 4A. Ib ~ 1uA
1. Fix H.V controller problem. Change the interlock schematic.
2. Heat the filament at ~ 2A
Make signal driver box for the primary sweep plates with gain and offset capabilities.
1. Alignment of the accelerator
2. Ion source #4 test: at filament current 5.2A, current on the shutter is 20-25uA w/o bias
3. P20SE Trek fails, 'overload' light is up during the test.
1. Maintenance
2. Put SBL turbo on. Leak check
3. ROWE connector caused the P20SE Trek failure. Arc through the interface. Fix the problem.
1. Ion source #4 test. At If=7.2A, current on the shutter ~ 80 uA w/o bias. This means that the ion source will works better on its second or third day run.
2. Accelerator alignment
3. Poloidal sweep calibration using primary beam detectors #2,4,8
1. Connect the primary beam detectors # 2,4,8 together to calibrate poloidal sweep plates.
2. Calibrate the primary toroidal sweep plates by the primary beam detectors #3,4,5