 Tue Feb 18 14:39:26 2020, Thomas Chillery, Target Thicknesses 
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| Excel spreadsheet showing CH2 and natC target thicknesses attached |
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Wed Sep 18 14:01:13 2019, Thomas Chillery, Logbook Spreadsheet
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| See attached for the logbook |
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Tue Dec 4 11:23:29 2018, Thomas Chillery, Chamber Dimensions
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See attached pictures for measurements of the 7Be(p,p) chamber dimensions.
The target ladder center - Far S2 distance = 50 + 95 + 0.85 - (19.22+19.58)/2 = 126.45 mm |
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Tue Dec 4 09:40:31 2018, Thomas Chillery, Preliminary measurements of target activation using geiger counter
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On 29/11/2018 at 17:40 a rough measurement of the irradiated target activity was performed using a geiger counter.
The geiger counter was a calibrated Berthold LB124, which was placed a fixed 15mm distance from each target.
The calibration was such that 1cps = 37kBq. |
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Tue Dec 4 09:38:18 2018, Thomas Chillery, 181122 Electronics Map
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See attached for S2 electronics map, following channels from S2 outputs to ADC inputs
For the 19/11/2018 - 29/11/2018 beamtime only the Far S2 was in operation |
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Mon Dec 3 19:04:20 2018, Thomas Chillery, Raffaele Buompane, End of beamtime - Items to be shipped back to Edinburgh
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To be shipped back to Edinburgh for repair:
Item
Quantity
ECL - NIM Convertor
2
Quad HV Supply
1
Quad |
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Mon Dec 3 18:55:31 2018, Thomas Chillery, Raffaele Buompane, End of beamtime - Cleanup 8x
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On 29/11/2018:
Dismounted S2 2323-18 (496um), 12um mylar, diode, and diodes 0.9um mylar.
Performed general cleanup of lab. Boxed away cables and other parts. See attached pictures 1, 2, 3, and 4. |
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Mon Dec 3 18:45:17 2018, Thomas Chillery, Raffaele Buompane, End of beamtime - Module settings
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Diode Ortec 571 Amplifier Settings:
Fine gain: 10 (0.5 ->1.5)
Course gain: 50
Shaping time: 0.5us
BLR AUTO: ON
NEG: ON (Instead
of POS)
OUT: ON (Instead of Delay)
Internal fine gain: 1X
Diode quad TFA settings: |
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Mon Dec 3 18:30:53 2018, Thomas Chillery, Raffaele Buompane, Calibration with alpha source - 12um mylar on Far S2
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On 28/11/2018:
Mounted 12um mylar in front of far S2 - see attached pictures 1 and 2
In air: Far S2 biased to -130.0V, leak I = 1.61uA. Diode biased to -70.1V, leak I = 0.01uA -> 0.00uA. Rate meter ~ 4500Hz. |
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Mon Dec 3 18:15:42 2018, Thomas Chillery, Raffaele Buompane, Calibration with alpha source - no mylar on Far S2
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On 28/11/2018:
At 13:35: Far S2 bias = -130.0V, leak I = 1.55uA. Diode bias = -70.1V, leak I = 0.00uA.
Pressures (mBar): |
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Mon Dec 3 17:59:48 2018, Thomas Chillery, Raffaele Buompane, Calibration with alpha source - 0.9um mylar on Far S2
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On 28/11/2018:
After pulser walkthrough (see eLog entry #67)
Dismounted targets from ladder - see picture 1 and 2 for upstream and downstream sides respectively |
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Mon Dec 3 17:51:46 2018, Thomas Chillery, Raffaele Buompane, Pulser Walkthrough
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On 28/11/2018:
Performed pulser walkthrough, Run # 181128090835
Run time: 1986s
Pulser ON, amplitude changed
Target: None
Beam: None
DT ~ 11%
See |
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Mon Dec 3 17:40:51 2018, Thomas Chillery, Carlo Bruno, Raffaele Buompane, Lab background
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On 27/11/2018:
Run # 181127200709
Run time: 46329s
Pulser ON, as before
No target
No beam
Lab background
DT ~ 12%
See |
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Mon Dec 3 17:34:38 2018, Thomas Chillery, Carlo Bruno, Raffaele Buompane, 6Li(p,p): Test measurement of 1.5MeV 6Li 1+ on thin CH2 50
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On 27/11/2018:
After tuning beam (see previous eLog entry # 64)
Run #181127193908 |
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Mon Dec 3 17:02:48 2018, Thomas Chillery, Carlo Bruno, Lizeth Morales, Guiseppe Porzio, Raffaele Buompane, 6Li(p,p): Tuning 1.5MeV 6Li 1+ beam
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On 27/11/2018:
Started tuning for 1.5MeV 6Li 1+. Set ladder to position #2 - Blank 10mm. Far S2 iris closed.
Run # 181127151653 |
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Mon Dec 3 16:47:40 2018, Thomas Chillery, Carlo Bruno, Lizeth Morales, Finishing 3.0MeV 7Be measurements with CH2 XIX and natC III
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On 27/11/2018:
At 8:40 Far S2 bias = -130.0V, leak I = 1.74uA. Diode bias = -70.1V, leak I = 0.00uA.
Pressures (mBar): |
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Mon Dec 3 16:39:42 2018, Thomas Chillery, Carlo Bruno, Tom Davinson, Raffaele Buompane, 3.0MeV 7Be on CH2 XIX
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On 26/11/2018:
Tuned beam for 3.0MeV 7Be 2+. Far S2 iris was closed during tuning.
After tuning, using 10mm aperture FCC = 5pA, using 3mm aperture FCC = 4pA. |
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Mon Dec 3 16:17:29 2018, Thomas Chillery, Carlo Bruno, Tom Davinson, Raffaele Buompane, David Rapagni, 3.0MeV 7Li on CH2 XIX and natC III
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On 26/11/2018, after changing the far S2 mylar foil (see previous eLog entry #60):
Checked pulser frequency on oscilloscope: 19.31Hz
Began tuning 3MeV 7Li 2+. |
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Mon Dec 3 15:51:11 2018, Thomas Chillery, Carlo Bruno, Tom Davinson, David Rapagni, Changing far S2 protective mylar foil, preparing for 3.0MeV 7Li and 7Be
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On 26/11/2018, after 6.0MeV 7Be and 7Li beam measurements:
At 11:15:
Far S2 bias = -130.0V, leak I = 1.60uA. Diode bias = -70.1V, leak I = 0.00uA. |
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Mon Dec 3 12:57:54 2018, Thomas Chillery, Carlo Bruno, Tom Davinson, David Rapagni, Finishing 6.0MeV 7Be 2+ and 7Li 2+ beam runs
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On 26/11/2018:
The accelerator and chamber setup were still operating after the overnight run.
Far S2 bias = -130V, leak I = 1.59uA. Diode bias = -70.1V, leak I = 0.00uA. |