 Wed Nov 21 09:34:26 2018, Thomas Chillery, Marialuisa Aliotta, Carlo Bruno, Setting up chamber both for tests under vacuum and physics measurement 
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Today we mounted the far aperture used to control the far iris. No problems were encountered with this.
We mounted the target ladder with the following configuration, see also pictures 1 and 2:
Target #
Target
I
Blank |
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Wed Nov 21 08:18:14 2018, Thomas Chillery, Marialuisa Aliotta, Checking Target Ladder Calibration
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On 19/11/2018:
There were three CH2 targets already mounted on the target frame, CH2 III, IV, and a damaged target. We dismounted these.
We noticed these previous target were mounted on the incorrect side of the target ladder, resulting in them being offset upstream from the central |
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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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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 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: |
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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 14:56:11 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 15:08:04 2018, Thomas Chillery, Lucio Gialanella, End of shift - lab cleanup
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Date: 07/04/2018
Began dismounting detectors:
All detectors powered off
Closed line and quadrupole valves
Preamp power off
Stopped turbos
Closed |
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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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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 |
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Fri Feb 16 18:10:34 2018, Thomas Chillery, David Rapagnani, Setup - Electronics Rack and Aperture Iris
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This morning we moved the electronics rack to within ~2.5m of the target chamber, leaving room for the ribbons cables of ~5m length which connect the
preamps to the amplifiers in the rack.
Then I continued in attempts to solve the iris arm problem, see eLog entry #3. |
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Fri Feb 16 18:28:42 2018, Thomas Chillery, David Rapagnani, Setup - Testing Chamber Vacuum
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By 16:40 I mounted all three chamber lids.
The central chamber lid includes the diode detector mount, the iris, a vacuum feedthrough, and an actuator with no hook.
The downstream chamber lid includes a vacuum feedthrough and an actuator with no hook. |
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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 11:54:55 2018, Thomas Chillery, Carlo Bruno, Tom Davinson, Raffaele Buompane, 7Li 6.0 MeV on CH2 XVI and XVIII, and on natC III
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On 25/11/2018:
At 8:45 the pressures read (mBar):
TPU1 = 1.0e-6
TPU2 = 3.2e-7
TPD1 = 6.5e-7
TPD2 = 6.1e-7
CHUP = Sensor Off
CHDW |
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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 12:32:54 2018, Thomas Chillery, Carlo Bruno, Tom Davinson, Lucio Gialanella, Raffaele Buompane, 6.0MeV 7Be on CH2 XVIII
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On 25/11/2018:
The beam was tuned for 6.0MeV 7Be 2+
Using 10mm aperture FCC = 12 pA |
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Mon Dec 3 11:28:53 2018, Thomas Chillery, Carlo Bruno, Tom Davinson, Lucio Gialanella, Antonino d'Leva, 7Be 4.0MeV on CH2 XVI and natC III
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On 24/11/2018:
After the short test with 4.0MeV 7Li (see eLog #55) the beam was tuned for 4.0MeV 7Be 2+.
Run # 181124103943 |
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Mon Nov 26 17:13:45 2018, Thomas Chillery, Carlo Bruno, Tom Davinson, Lucio Gialanella, Preparing chamber for 4MeV 7Be 2+ beam
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On 24/11/2018:
At 8:35 the chamber pressures read (mBar):
TPU1 = 2.2
TPU2 = 2.2
TPD1 = 2.2
TPD2 = 2.0
CHUP = Sensor Off
CHDW = No Sensor
The |
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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. |