 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 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 17:40:51 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 17:02:48 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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Tue Aug 1 12:26:13 2017, Thomas Chillery, 10th - 22nd July 2017 Summary Report
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Attached is a report summarising work performed on the electronics and target chamber in CIRCE from the 10th to the 22nd July 2017.
Outstanding problems have also been listed. |
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Thu Feb 15 20:45:27 2018, Thomas Chillery, Planning - Target Chamber CAD diagram
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| Find attached the latest CAD diagram of the Target Chamber, drawn by Peter Black |
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Fri Feb 16 18:21:17 2018, Thomas Chillery, Iris arm problems
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After lunch we were still having problems with the aperture hook, see first attached image highlighting the arm is located in close proximity (but not
touching) the vacuum feedthrough and ribbon cable.
Meanwhile in Edinburgh Peter Black designed and built an additional component of the hook to assist in connecting it between the actuator and |
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Sat Feb 17 12:35:25 2018, Thomas Chillery, Setup - Electronic Cabling
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Between 9:00 to 12:30 this morning Filipo was working on the weekend 14C measurements, allowing me to work in the lab during this period.
I unpacked four MALU 4532 Lecroy Logic Modules (sent to CIRCE two weeks ago). Three of these modules were installed into the 1434A CAMAC crate,
which already had one module installed from the July 2017 shift. One module remains out of the crate as a spare. |
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Sat Feb 17 13:00:51 2018, Thomas Chillery, Test - S2 Detector Bias
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This morning whilst I was setting up the ribbon cabling (see eLog entry #8) I was considering collecting a voltage bias vs leakage current curve for
one/two of the S2 detectors, depending on time available.
This would involve using the central section of the chamber and the straight spacer box to mount the preamp on top of the lid. |
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Tue Feb 20 16:57:49 2018, Thomas Chillery, Screenshots - ADC 2 and ADC 4 settings, and example pulser walkthrough 11x
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Thu Feb 22 14:55:09 2018, Thomas Chillery, ADC6 Settings
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| DAQ Settings for ADC6 settings attached. ADC 6 has been used for the pin diode during the week starting 19/02/2018 |
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Wed Jul 11 15:55:35 2018, Thomas Chillery, Electronics Channel Map
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See attached for Electronics Channel Map spreadsheet.
This is valid for the February 2018 Beamtime; it maps out the Far S2 Strips onto the ADC channels
A map should be produced and updated for each beamtime to ensure S2 Strip -> ADC Channel is correctly documented. |
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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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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 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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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 Feb 18 14:39:26 2020, Thomas Chillery, Target Thicknesses
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| Excel spreadsheet showing CH2 and natC target thicknesses attached |