 Fri Apr 13 14:56:11 2018, Thomas Chillery, Lucio Gialanella, 7Be 5.0MeV Beam test on CH2 target IV with central S2 and downstream S2 channels 0-7
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Date: 07/04/2018
FC - 4 = 410 - 260 = 150 pA
We moved the target ladder to position V (35.022mm) - CH2 Target IV |
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Fri Apr 13 14:42:31 2018, Thomas Chillery, Lucio Gialanella, 7Be 5.0MeV Beam test on CH2 target III with central S2 and downstream S2 channels 0-7
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Date: 07/04/2018
To run the measurement we:
Opened the central iris (actuator setting = 14.0mm)
Opened the downstream iris (actuator setting = 1.5mm)
Set the |
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Fri Apr 13 14:31:59 2018, Thomas Chillery, Lucio Gialanella, Setting up for 7Be 5.0MeV beam
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Date: 07/04/2018
We changed to cathod 23 - 7Be
For beam tuning we: |
Fri Apr 13 13:59:18 2018, Thomas Chillery, Lucio Gialanella, 7Li 5.0MeV Beam test with Central S2 and Downstream S2 first 8 channels 
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Date: 07/04/2018
At 12:10 we started the DAQ for 5.0 MeV 7Li in 2+ charge state bombarding CH2 Target III
Save name: RData_1/180407111531
DT = 0%
Trigger rate ~ 30 Hz
Event mult = 77.5
At |
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Fri Apr 13 08:24:47 2018, Thomas Chillery, Lucio Gialanella, Attempting to add downstream S2 to DAQ setup and fixing problems during setup
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Date: 07/04/2018 (Last day of April shift)
9:55 pressures read: CHUP = 1.3e-5 mBar, CHDW = 3.5 e-5 mBar
I noticed the preamp power (+/- 15V) was left on overnight. The +15V still draws 1.5A and -15V draws ~600mA as expected. During this shift no |
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Thu Apr 12 14:14:09 2018, Thomas Chillery, Raffaele Buompane, 7Be 5.0MeV Beam test with central S2
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Date: 06/04/2018
Before starting this beam test we lowered the channel thresholds on ADC 3 and 4 (modules 4 and 5) from 40 to 8
The diode Ortec 571 settings are: |
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Thu Apr 12 13:12:00 2018, Thomas Chillery, Raffaele Buompane, 7Li 5.0MeV Beam tests with Central S2
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Date: 06/04/2018 (after 16:40)
We powered the preamps for the two S2 detectors and the diode.
We biased the detectors: |
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Thu Apr 12 12:47:04 2018, Thomas Chillery, Raffaele Buompane, Central S2 Alpha Calibration
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Date: 06/04/2018
We connected the analogue signals of RAL X, XII, XIII, and "R" to the 3rd ADC (Module 4)
We connected the analogue signals of RAL "S", "Q", "u", and "w" to the 4th ADC (Module 5) |
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Fri Apr 6 14:54:12 2018, Thomas Chillery, Raffaele Buomparte, Tests - Attempting to solve noise issues
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Today we started by mounting the central and downstream preamp box lids.
The pumps were left running overnight, at 9:06 CHUP = 2.1e-5mBar and CHDW = 5.8e-5mBar.
We biased the detectors |
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Fri Apr 6 13:33:27 2018, Thomas Chillery, Raffaele Buomparte, David Rapagni, Jeremias Duartes, Tests - Attempting to solve noise issues
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On 05/04/18, after eLog #28
After the alpha calibrationrun Raffaele arrived and started beam tuning for 7Li 2+ at 5.0MeV using a LiO molecular source
We set the target ladder to position II (80.024 mm) - no target frame or target |
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Fri Apr 6 12:07:52 2018, Thomas Chillery, Raffaele Buomparte, David Rapagni, Jeremias Duartes, Tests - Attempting to solve noise issues, 15 min alpha calibration
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On 05/04/18:
At 9:00 the pressures read ~10mBar inside the chamber (static vacuum). We began venting the chamber.
During venting the cable daisy chain on top of the preamp boxes was removed, the downstream preamp box was removed. It was decided to also removed |
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Fri Apr 6 11:39:10 2018, Thomas Chillery, Raffaele Buompane, David Rapagnani, Lucio Gialanella, Tests - Pumping down chamber and starting electronics tests
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On 04/04/18:
We mounted S2 2323-18 (496um) in the downstream position with 12um mylar
We mount the central and downstream iris arms, we set the central arm position to 14.0mm and the downstream arm position toe 1.5mm - opening |
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Tue Apr 3 18:16:26 2018, Thomas Chillery, Lizeth Morales, Raffaele Buompane, Lucio Gialanella, Tests - Unpacking and Mounting Chamber Parts
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This morning I unpacked the chamber parts.
I mounted the downstream and central lids with the iris arm hooks to double check we could still successfully mount them, see previous eLog entry
(#25) for photos from this procedure performed in Edinburgh. |
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Tue Mar 27 16:36:01 2018, Thomas Chillery, Peter Black, Tests - Modifying Chamber Parts in Edinburgh 11x
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Between 7th to 21st March modifications were made to the top of the CIRCE target chamber.
These modifications address the three key issues highlighted during the February shifts
1. The central S2 detector did not fit, because its connector pins came into contact with the chamber lid |
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Wed Mar 7 16:56:52 2018, Thomas Chillery, Peter Black, Tests - Modifying Chamber Parts in Edinburgh
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Today we began examining and modifying parts of the chamber shipped from CIRCE to Edinburgh.
The parts shipped were:
Chamber Collar
Central Lid
Downstream Lid
Two Metal Detector Masks
Two Iris Mounts
One |
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Tue Mar 6 15:55:04 2018, Thomas Chillery, Raffaele Buompane, End of February 2018 Shifts
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On 23/02/2018:
At the end of the February 2018 shifts the detectors bias settings were:
S2 bias = -130.3V, leak I = 2.42uA |
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Tue Mar 6 15:41:53 2018, Thomas Chillery, Raffaele Buompane, Pin Diode Pulser Walkthrough at End of February Shifts
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On 23/02/2018:
After the alpha source calibration of the S2 (See eLog entry #21) we decided to perform a pulser walkthrough for the pin diode on ADC 6 CH 31.
The pulser was only connected to the pin diode preamp to ensure it wasnt being split. |
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Tue Mar 6 15:29:55 2018, Thomas Chillery, Raffaele Buompane, Collecting S2 Alpha Calibration Spectra at End of February Test Shifts
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On 23/02/2018:
We moved the target ladder to position 7, 5.019mm, with the alpha source facing downsteam.
At 17:17 we started the DAQ for a 15 minute alpha spectrum on the downstream S2. Save name: /Remote_Objs/RData_1/180223172135 |
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Sun Feb 25 15:59:38 2018, Thomas Chillery, Lizeth Morales, Raffaele Buompane, David Rapagnani, Lucio Gialanella, Measurement - 3.45MeV 7Li on CH2 Target III
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On 23/02/2018 at 13:49 we started the DAQ in list mode.
After starting the DAQ we sent the 3.45MeV 7Li beam onto the CH2 930ug/cm2 target III.
The trigger rate ~ 2kHz, event multiplicity = 6.1, dead time ~ 9%. |
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Sun Feb 25 15:14:54 2018, Thomas Chillery, Lizeth Morales, David Rapagnani, Setup - Beam Tuning and Prepare Chamber for Measurement at 3.45MeV 7Li - Morning of 23rd
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On the morning of 23/02/18 we aimed to complete beam tuning of 7Li at 3.45MeV.
At 8:43 CHUP = 7.2e-6mBar, CHDW = 1.9e-5mBar.
The S2 bias was ramped to -130.3V, leak I = 1.67uA. The diode bias was ramped to -70.1V, leak I = 0.01uA. The preamp power was also switched |