 Tue Feb 18 14:39:26 2020, Thomas Chillery, Target Thicknesses 
|
| Excel spreadsheet showing CH2 and natC target thicknesses attached |
|
Wed Sep 18 14:01:13 2019, Thomas Chillery, Logbook Spreadsheet
|
| See attached for the logbook |
|
Tue Dec 4 11:23:29 2018, Thomas Chillery, Chamber Dimensions
|
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 |
|
Tue Dec 4 09:40:31 2018, Thomas Chillery, Preliminary measurements of target activation using geiger counter
|
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. |
|
Tue Dec 4 09:38:18 2018, Thomas Chillery, 181122 Electronics Map
|
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 |
|
Mon Dec 3 19:04:20 2018, Thomas Chillery, Raffaele Buompane, End of beamtime - Items to be shipped back to Edinburgh
|
To be shipped back to Edinburgh for repair:
Item
Quantity
ECL - NIM Convertor
2
Quad HV Supply
1
Quad |
|
Mon Dec 3 18:55:31 2018, Thomas Chillery, Raffaele Buompane, End of beamtime - Cleanup 8x
|
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. |
|
Mon Dec 3 18:45:17 2018, Thomas Chillery, Raffaele Buompane, End of beamtime - Module settings
|
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: |
|
Mon Dec 3 18:30:53 2018, Thomas Chillery, Raffaele Buompane, Calibration with alpha source - 12um mylar on Far S2
|
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. |
|
Mon Dec 3 18:15:42 2018, Thomas Chillery, Raffaele Buompane, Calibration with alpha source - no mylar on Far S2
|
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): |
|
Mon Dec 3 17:59:48 2018, Thomas Chillery, Raffaele Buompane, Calibration with alpha source - 0.9um mylar on Far S2
|
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 |
|
Mon Dec 3 17:51:46 2018, Thomas Chillery, Raffaele Buompane, Pulser Walkthrough
|
On 28/11/2018:
Performed pulser walkthrough, Run # 181128090835
Run time: 1986s
Pulser ON, amplitude changed
Target: None
Beam: None
DT ~ 11%
See |
|
Mon Dec 3 17:40:51 2018, Thomas Chillery, Carlo Bruno, Raffaele Buompane, Lab background
|
On 27/11/2018:
Run # 181127200709
Run time: 46329s
Pulser ON, as before
No target
No beam
Lab background
DT ~ 12%
See |
|
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
|
On 27/11/2018:
After tuning beam (see previous eLog entry # 64)
Run #181127193908 |
|
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
|
On 27/11/2018:
Started tuning for 1.5MeV 6Li 1+. Set ladder to position #2 - Blank 10mm. Far S2 iris closed.
Run # 181127151653 |
|
Mon Dec 3 16:47:40 2018, Thomas Chillery, Carlo Bruno, Lizeth Morales, Finishing 3.0MeV 7Be measurements with CH2 XIX and natC III
|
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): |
|
Mon Dec 3 16:39:42 2018, Thomas Chillery, Carlo Bruno, Tom Davinson, Raffaele Buompane, 3.0MeV 7Be on CH2 XIX
|
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. |
|
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
|
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+. |
|
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
|
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. |
|
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
|
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. |
|
Mon Dec 3 12:32:54 2018, Thomas Chillery, Carlo Bruno, Tom Davinson, Lucio Gialanella, Raffaele Buompane, 6.0MeV 7Be on CH2 XVIII
|
On 25/11/2018:
The beam was tuned for 6.0MeV 7Be 2+
Using 10mm aperture FCC = 12 pA |
|
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
|
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 |
|
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
|
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 |
|
Mon Nov 26 17:13:45 2018, Thomas Chillery, Carlo Bruno, Tom Davinson, Lucio Gialanella, Preparing chamber for 4MeV 7Be 2+ beam
|
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 |
|
Mon Nov 26 17:10:13 2018, Thomas Chillery, Marialuisa Aliotta, Carlo Bruno, Tom Davinson, Raffaele Buompane, 7Li 4.0 MeV beam on natC target 3
|
On 23/11/2018:
After the runs with 7Li on CH2 15, we moved the target ladder to position 5: carbon foil #3 (~590 ug/cm^2)
Run # 181123214406 |
|
Sat Nov 24 16:39:22 2018, Thomas Chillery, Marialuisa Aliotta, Carlo Bruno, Tom Davinson, Raffaele Buompane, 7Li 4.0 MeV beam on CH2 target 15
|
On 23/11/2018:
Tuned beam for 4.0 MeV 7Li, charge state 2+
Measured transmission of beam through FCC using 3 mm and 10 mm size collimators: 66 pA with 10 mm -> 60 pA with 3 mm -> 91% transmission |
|
Sat Nov 24 16:29:10 2018, Thomas Chillery, Marialuisa Aliotta, Carlo Bruno, Tom Davinson, Raffaele Buompane, Preparing setup for 7Li beam
|
On 23/11/2018:
10:15 started pumping down chamber with Ecodry 2
RAL thresholds: |
|
Sat Nov 24 15:07:00 2018, Thomas Chillery, Marialuisa Aliotta, Carlo Bruno, Lizeth Morales, Tom Davinson, Searching for causes of noise
|
On 22/11/2018 in the afternoon:
We increased the ADC thresholds to 40 (previously 8).
For an alpha source with pulser connected, the event multiplicity dropped from ~63 to ~10. Dead time ~ 7% |
|
Sat Nov 24 15:05:40 2018, Thomas Chillery, Marialuisa Aliotta, Carlo Bruno, Lizeth Morales, FAIR DAQ
|
The FAIR DAQ IP address: 192.168.1.90
The data is saved in /Local_Parts/Part0DE/
After each run we should copy the data to the 7Be shift folder: /home/circe/7Be_pp/181122/ |
|
Thu Nov 22 11:53:08 2018, Thomas Chillery, Marialuisa Aliotta, Carlo Bruno, Lizeth Morales, DAQ tests with alpha source
|
The target ladder is set for position 7 - the double alpha source.
Looking at the FAIR DAQ, for the Far S2 the first RAL amplifier (XV) shows:
Alphas at channel 700
Pulser centroid at channel ~2640, with 9 channel FWHM -> corresponds to 44 keV FWHM at 4.91 keV/channel
The |
|
Thu Nov 22 11:34:07 2018, Thomas Chillery, Marialuisa Aliotta, Carlo Bruno, Lizeth Morales, Continuing Electronic Chain Tests
|
This morning at 8:35am the pressures read (in mBar):
TPU1 = 2.0e-6
TPU2 = 4.5e-7
TPD1 = 8.1e-7
TPD2 = 7.9e-7
CHUP = 4.7e-7
CHDW = 1.1e-5
The
detectors were biased. Far S2 leak I = 1.54uA, near S2 leak I = 12.53uA. |
|
Wed Nov 21 09:34:26 2018, Thomas Chillery, Marialuisa Aliotta, Carlo Bruno, Setting up chamber both for tests under vacuum and physics measurement
|
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 |
|
Wed Nov 21 09:28:06 2018, Thomas Chillery, Marialuisa Aliotta, Carlo Bruno, Lizeth Morales, Problem encountered with near iris arm
|
On 20/11/2018:
After the electronics tests in air (see eLog entry #44) we started to setup the chamber for vacuum tests with an alpha source.
We started mounting the aperture used for controlling the near iris arm, however we encountered a problem. The iris arm got stuck and could not |
|
Wed Nov 21 09:09:41 2018, Thomas Chillery, Marialuisa Aliotta, Carlo Bruno, Lizeth Morales, David Rapagni, Mounting Detectors / Continuing Electronic Chain Tests
|
On 20/11/2018:
At 9:00 we walked into the lab, David R reported he found all the pumps OFF. A thunderstorm occurred overnight causing a power outage.
Last night we had switched off the electronics (Preamp power, RAL amp rack, and NIM bin). |
|
Wed Nov 21 08:53:06 2018, Thomas Chillery, Marialuisa Aliotta, Carlo Bruno, Lizeth Morales, Testing Electronic Chain - No Detectors
|
On 19/11/2018:
During the vacuum test - see eLog entry #43 we performed noise tests on the preamplifiers with no S2 detector connected
First we performed a "tabletop" test - the preamplifiers were not connected to the chamber. |
|
Wed Nov 21 08:45:03 2018, Thomas Chillery, Marialuisa Aliotta, Raffaele Buompane, Carlo Bruno, Testing Chamber Vacuum
|
On 19/11/2018:
We mounted the following in the chamber:
Iris frames - no S2 detectors or mylar
Si pin diode mount with 0.9um mylar - no diode
Target ladder with blank |
|
Wed Nov 21 08:37:24 2018, Thomas Chillery, Marialuisa Aliotta, Raffaele Buompane, Upstream Collimator
|
On 19/11/2018:
During the target ladder calibration (see elog entry #41) we also replaced the collimator (thickness ~24mm, diameter 3mm) located immediately
upstream from the target ladder - that is between the upstream and central sections of the chamber. We mounted an aluminium collimator (thickness ~1mm, |
|
Wed Nov 21 08:18:14 2018, Thomas Chillery, Marialuisa Aliotta, Checking Target Ladder Calibration
|
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 |
|
Wed Jul 11 15:55:35 2018, Thomas Chillery, Electronics Channel Map
|
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. |
|
Fri Apr 13 15:08:04 2018, Thomas Chillery, Lucio Gialanella, End of shift - lab cleanup
|
Date: 07/04/2018
Began dismounting detectors:
All detectors powered off
Closed line and quadrupole valves
Preamp power off
Stopped turbos
Closed |
|
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
|
Date: 07/04/2018
FC - 4 = 410 - 260 = 150 pA
We moved the target ladder to position V (35.022mm) - CH2 Target IV |
|
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
|
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 |
|
Fri Apr 13 14:31:59 2018, Thomas Chillery, Lucio Gialanella, Setting up for 7Be 5.0MeV beam
|
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
|
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 |
|
Fri Apr 13 08:24:47 2018, Thomas Chillery, Lucio Gialanella, Attempting to add downstream S2 to DAQ setup and fixing problems during setup
|
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 |
|
Thu Apr 12 14:14:09 2018, Thomas Chillery, Raffaele Buompane, 7Be 5.0MeV Beam test with central S2
|
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: |
|
Thu Apr 12 13:12:00 2018, Thomas Chillery, Raffaele Buompane, 7Li 5.0MeV Beam tests with Central S2
|
Date: 06/04/2018 (after 16:40)
We powered the preamps for the two S2 detectors and the diode.
We biased the detectors: |
|
Thu Apr 12 12:47:04 2018, Thomas Chillery, Raffaele Buompane, Central S2 Alpha Calibration
|
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) |
|
Fri Apr 6 14:54:12 2018, Thomas Chillery, Raffaele Buomparte, Tests - Attempting to solve noise issues
|
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 |
|
Fri Apr 6 13:33:27 2018, Thomas Chillery, Raffaele Buomparte, David Rapagni, Jeremias Duartes, Tests - Attempting to solve noise issues
|
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 |
|
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
|
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 |
|
Fri Apr 6 11:39:10 2018, Thomas Chillery, Raffaele Buompane, David Rapagnani, Lucio Gialanella, Tests - Pumping down chamber and starting electronics tests
|
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 |
|
Tue Apr 3 18:16:26 2018, Thomas Chillery, Lizeth Morales, Raffaele Buompane, Lucio Gialanella, Tests - Unpacking and Mounting Chamber Parts
|
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. |
|
Tue Mar 27 16:36:01 2018, Thomas Chillery, Peter Black, Tests - Modifying Chamber Parts in Edinburgh 11x
|
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 |
|
Wed Mar 7 16:56:52 2018, Thomas Chillery, Peter Black, Tests - Modifying Chamber Parts in Edinburgh
|
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 |
|
Tue Mar 6 15:55:04 2018, Thomas Chillery, Raffaele Buompane, End of February 2018 Shifts
|
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 |
|
Tue Mar 6 15:41:53 2018, Thomas Chillery, Raffaele Buompane, Pin Diode Pulser Walkthrough at End of February Shifts
|
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. |
|
Tue Mar 6 15:29:55 2018, Thomas Chillery, Raffaele Buompane, Collecting S2 Alpha Calibration Spectra at End of February Test Shifts
|
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 |
|
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
|
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%. |
|
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
|
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 |
|
Fri Feb 23 13:15:05 2018, Thomas Chillery, Raffaele Buompane, David Rapagnani, Setup - Beam Tuning and Prepare Chamber for Measurement at 3.45MeV 7Li - Night of 22nd
|
Checking SRIM 3.5 MeV 7Li is stopped in 9.06um mylar or 10.09 um CH2.
After the long run at 3.0MeV on 22/02/2018 we decided to put the 12um mylar back in front of the S2 and start tuning the beam for 3.45MeV 7Li.
We also decided to tune the beam to a higher current of ~ 100pA to try and improve the detection rates. |
|
Thu Feb 22 18:04:12 2018, Thomas Chillery, Raffaele Buompane, David Rapagnani, Lucio Gialanella, Measurement - 3.0MeV 7Li on CH2 Target VII
|
Yesterday (21st) night we saw this low channel, high rate (1500Hz) noise on the diode spectrum - see eLog entry #15.
This morning the S2 bias was ramped to -130.3V, leak I = 1.43uA. Diode bias ramped to -70.0V, leak I = 0.01uA.
Starting the DAQ with no beam, the trigger rate is ~250 Hz, with most triggers coming from the diode. Inspecting with the oscilloscope we find |
|
Thu Feb 22 14:55:09 2018, Thomas Chillery, ADC6 Settings
|
| DAQ Settings for ADC6 settings attached. ADC 6 has been used for the pin diode during the week starting 19/02/2018 |
|
Thu Feb 22 10:40:49 2018, Thomas Chillery, Raffaele Buompane, David Rapagnani, Lucio Gialanella, Measurement / Test - 3.0MeV 7Li on CH2 Target VII
|
On 21/02/2018 after beam tuning and pumping down at 18:07 the pressures read Up = 1.2e-5mBar, Down = 3.2e-5mBar. We were happy to power the detectors
and try to observe spectra from beam in both the S2 and pin diode.
Whilst waiting for the turbos to spin up the Pin diode was daisy chained with the +ve pulser, +15V, and -15V preamp power cables used with EDI |
|
Thu Feb 22 07:58:48 2018, Thomas Chillery, Tom Davinson, Raffaele Buompane, David Rapagnani, Lucio Gialanella, Setup - Beam Tuning and Prepare Chamber for Measurement at 3.0MeV 7Li
|
On 21/02/2018 we reattempted the beam tuning. We expected this to be easier now the rogue mylar is removed from the beamline.
At 8:30 we started the roughing pumps. At 8:37 the turbos were switched on. By 8:55 the preassures read: Up = 1.6e-5, and Down = 4.3e-5
mBar. |
|
Wed Feb 21 10:46:22 2018, Thomas Chillery, Tom Davinson, Raffaele Buompane, David Rapagnani, Setup - Pulser Settings and 20/02/2018 Pulser Walkthrough
|
The PB-5 Pulse Generator settings are as follows:
Fall Time = 100us
Rate = 2.00Hz |
|
Tue Feb 20 17:03:08 2018, Thomas Chillery, Tom Davinson, Raffaele Buompane, David Rapagnani, Setup - Beam Tuning
|
The pumps were left on overnight, in the morning at 8:25 the pressure reads:
Up = 1.5e-5 mBar and Down = 4.0e-5 mBar.
We made a first attempt at collecting an alpha spectrum for the far S2 detector using ADC 2 and ADC 3. However ADC 3 appeared to be acting as |
|
Tue Feb 20 16:57:49 2018, Thomas Chillery, Screenshots - ADC 2 and ADC 4 settings, and example pulser walkthrough 11x
|
| |
|
Tue Feb 20 09:19:19 2018, Thomas Chillery, Tom Davinson, Raffaele Buompane, David Rapagnani, Setup - Testing Chamber Vacuum and Mounting Detectors and Alpha Source
|
(Note: Tom Davinson is now in CIRCE until the 21st)
On 19/02/2018 we performed the following:
This morning we gave CIRCE technician Antonio slanted spacer boxes (for mounting preamps) and also the Al box (used for target ladder) for minor |
|
Sat Feb 17 13:00:51 2018, Thomas Chillery, Test - S2 Detector Bias
|
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. |
|
Sat Feb 17 12:35:25 2018, Thomas Chillery, Setup - Electronic Cabling
|
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. |
|
Fri Feb 16 18:28:42 2018, Thomas Chillery, David Rapagnani, Setup - Testing Chamber Vacuum
|
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. |
|
Fri Feb 16 18:21:17 2018, Thomas Chillery, Iris arm problems
|
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 |
|
Fri Feb 16 18:10:34 2018, Thomas Chillery, David Rapagnani, Setup - Electronics Rack and Aperture Iris
|
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. |
|
Thu Feb 15 20:45:27 2018, Thomas Chillery, Planning - Target Chamber CAD diagram
|
| Find attached the latest CAD diagram of the Target Chamber, drawn by Peter Black |
|
Thu Feb 15 17:45:07 2018, Thomas Chillery, Raffaele Buompane, Setup - Problem: Connecting the actuator arm to the iris aperture arm
|
After lunch we attempted to connect the actuator arms to the iris arm used to change the iris diameter. We need two iris diameters: fully open for experiment
measurements and a 5mm diameter for beam focusing
To do this the original design uses a cuboid with two rods, one rod is connected to the actuator arm, and the other rod is connected to the iris |
|
Thu Feb 15 17:34:28 2018, Thomas Chillery, Raffaele Buompane, Setup - Mounting Target Chamber Sections
|
This morning both myself and Raffaele mounted the beamline section of the target chamber.
We also mounted the turbo located immediately downstream from the target chamber, see attached IMG_2621.jpg image - the beam will enter from
the right of the image |
|
Tue Aug 1 12:26:13 2017, Thomas Chillery, 10th - 22nd July 2017 Summary Report
|
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. |