From Alex, attached.

Each month's notes are attached.  Unfinished business naturally carries over to the next month.

This elog will be updated with new notes as necessary.

NB: These are the notes composed *prior* to the meeting, thus do not include any suggestions or corrections.

http://npg.dl.ac.uk/TargetRequests/

https://www.technologysi.stfc.ac.uk/Pages/Target-frames.aspx

The standard frame is NSF CP type 3

Asked for 5x 100 ug/cm^2 Au.

From Ruchi's friend Rob.

http://www.dhl.com/en/express/tracking.html?AWB=1647723055&brand=DHL

A couple scans from my notes which may be useful.

One discusses alpha energy loss in nominal kitchen foil (~12 um) and also introduces my technique to calibrate a thin (~20 um) SSD.  Sorry I forget which student's thesis it's from, either Sakaguchi of CNS Tokyo or perhaps Dahee Kim of 
Ewha.  They both did alpha measurements in 2015 as memory serves.  It shows we could measure the thickness of the 12.5 um Al foil from Goodfellow with a standard source.

The second is just an email to a colleague about how I went about measuring some foils by weight.  In that case, I want to get an idea on "how much aluminium might be evaporated on the mylar" and I got, I believe, a pretty sensible 
answer.  Of course, I *assumed* that the mylar was the nominal value.

Conor will take:

==Black clicker case==

Foam packed, gas cell "b" with 12.5 um Al entrance window.
Target ladder with broken gas cell installed.

Daid will take:

==Backpack etc==

1 box with 4 quick-release gas tube hoses.
One bag with 6 teflon foot supports.
One small bag with gain screwdriver, 2 LEMO barrels, a bag of M2 screws from Japan, 1 gas cell saddle.
Gas cell feedthrogh, in bubble wrap
Gas cell vacuum bypass, including analog gauge dial.
One bag with extra O-rings and the acrylic window for the gas feedthrough itself
Silena Quad Bias Supply 7710
4 imperial spanners for Swagelok
2 Notebooks (common one and daid's one)

1) DAQ

We have 192 channels to DAQ working. Mirco will test the silicon detectors with an alpha source in the next 2 weeks. 

2) Vacuum

In the moment we reach 6E-6. There are still 2 tiny leaks. There will be an extra turbo for the upstream beam line which should improve the vacuum for ISOLDE purposes. 
We need to check how fast we can pump down as might need to open the chamber between tuning and beam time (detectors need to be protected from tune beam).

3) Alignment

Alignment of the sample positions can be done here (Mirco/Peter). Claudia will contact Karl about a survey team for alignment at ISOLDE. Then we can talk to them directly.

4) Shipping

We aim to ship the setup to CERN by the end of March. We will try to go over to CERN for initial setup middle of April (to be confirmed with Karl)

5) Equipment needed from CERN

Claudia will ask Karl about availability of a CAMAC crate and 2 NIM bins. 

6) Safety

Peter will order safety boots and hard hats. 
Those who do not have ISOLDE access need to attend the ISOLDE radiation protection course. 

7) Availability for Preparations

Tom not here: 25 March - 3 April, 25 April - middle June
Daid not here: until middle June ?

8) Samples CH2, CD2

Paul has new batch and should send alpha spectra soon.

Thursday, 7th September:

Vaccum after pumping all night preamps off, chiller off

• 09:37: IMG1 2.3E-5 mbar, Chamber 7.5 E-5 mbar; Julabo off;
• 09:38: IMG1 2.1E-5 mbar; Chamber 6.6E-5 mbar; Julabo 20 Celsius
• 09:41: IMG1 2E-5; Chamber 6.6E-5; Julabo 5 Celsius
• 09:55: IMG1 1.3E-5; Chamber 1.3E-5
• 10:10 IMG1 1.2E-5; Chamber 4.5E-5;

Preamp power ON, Chiller on 5 Celsius

• 10:25 IMG1 1.3E-5; 5E-5; Thermocoupling Readout 16 Celsius
• 11:20 IMG1 1.5E-5; 6.1E-5 Thermocoupling Readount 19.3
• 13:08 IMG1 1.6E-5; 5.5E-5
• 14:16 IMG1 1.4E-5; 5.1E-5
• 15:40 IMG1 1.4E-5; 4.9E-5
• 17:55 IMG1 1.3E-5; 4.5E-5

Preamp OFF, chiller off

8th September

• 1.2E-5; 3.9E-5

--> Leak test with He, replace target ladder with blank and refit feedtrhrough (upstream detectors), identify some scratches

start pumping

• 23:50 IMG1 2.2E-5; Chamber 9E-5

9th September

• 08:17 IMG1 1.3E-5; 5.1E-5 mbar

Leak test but no leaks found anywhere now.

Chiller on 5 Celsius, preamplifiers ON

• 10:55 IMG1 9.1E-6; 3.8E-5
• 12:00 IMG1 8.9E-6; 4.0E-5
• 14:50 IMG1 8.1E-6; 3.6E-5

Preamplifiers OFF

• 15:05 IMG1 6.3E-6; 2.9E-5 (9.8 C)
• 15:12 IMG1 6.1E-1; 2.9E-5 (9.3 C)
• 15:25 IMG1 5.9E-6; 2.8E-5 (9.0 C)

Chiller OFF (not sure when exactly chiller was turned off)

Sunday 10/09/2017

• 22:50 IMG1 8.8E-06; 3.4E-05

Monday 11/09/2017

• 9:20 IMG1 8.2E-06; 2.7E-05

Leak test on Cooling loop. --> Big leak detected. Open up chamber to replace cooling.

Tuesday 12/09/2017

Several tests done for cooling, it seems that even the smallest possible cooling loop is leaky.

• 19:00, close chamber and start pumping
• 19:13 start both turbo pumps at 9.9E-1 mbar
• 19:23 P=2.7E-4 mbar

Note that big Turbopump has been switched to normal start so pumping times not comparable with before. Maximum wattage of pump should be 420 W

Wednesday 13/09/2017

• 9:15 8.5E-6 mbar; 3.1E-5mbar
• 9:30 Cooling ON, switched to -10C
• 10:05 4.4E-6 mbar; 1.7E-5 bar (-9.9C on chiller)
• 10:15 preamps on, -10 C, 4.1E-6; 1.6E-5 mbar
• 10:22 T readout 5.6 C, 4.6E-6; 1.8E-5
• 10:26 T readount 6.2 C; 4.8E-6 mbar, 1.9E-5 mbar
• 10:40 4.9E-6 mbar; 1.9E-5 mbar

Preamps off, cooler off

open chamber for detector installation and some checks; close chamber and pump

• 18:55 7.2E-5; 3.3E-4 mbar
• 20:45 4.4E-5; 1.8E-4 mbar (nopreamp, no chiller)

Thursday, 14 September 2017

• 9:25 1.1E-5mbar; 4.3E-5 mbar

open chamber to discuss with beam operators

• 11:05 close chamber start pumping
• 11:20 1.2 mbar, turbo pumps on
• 11:32 4.1E-4 mbar; 1.1E-3 mbar

dE detector: 2083-9, 74 um thick, V_depletion=12V; V_operating=24 V

E detector:  3080-23, 1012 um thick, V_d=110; V_o=350 V

HI detector: 2410-23, 65 um; V_d=7 ; V_o=14 V

Connect bias cables 14,15,16 (dE,E,HI)

Quad Bias Supply ports 1,2,3 (dE,E,HI). There seems to be some offset voltage on them (V1=3V, V2=7V, V3=1V, V4=4V) Seems to go dowon when preamps are on.

Leakage Currents

dE:

E:

HI:

ADC#1 0-31: p+n dE

ADC#2 32-48: n+n dE

ADC#2 49-64: p+n dE

ADC#3 0-31: p+n E

ADC#4 32-48: n+n E

ADC#4 49-64: p+n E

ADC#5 0-31: p+n HI

ADC#6 32-48: n+n HI

ADC#7 49-64: p+n HI

Run 1-10 Test

14 September 2017

Run 11 Start 18:16 (CERN time)

Faults:

adc#2 7,8 missing segments (n+n side dE)

adc#3 19 low gain (p+n E)

some strips have no noise but maybe that is OK.

Run 12 Start 11:50

Pulse switched on halfway through

Run 13 Start 12:08

Pulser on

ADC spectra:

#1 ch0 bad resolution (also pulser)

#2 ch7 ch8: no alphas, pulser there

#3 ch0 low gain, ch24 low resolution

#4 ch 7 low gain only for alphas (not pulser)

TDC missing: ch 32,80,120,123

Not understood yet: 1mm detector has peak at ~1.5 MeV @ adc#3 ch20-30 (with ALL alpha events when visible , 24 looks very distorted); not visible in ADC#4 (n+n) no alpha in ADC#6 although segment.

Alpha Calibration Runs (need to check settings in logbook)

0-63: dE detector and 32-47 is n+n;  64-127 E detector and 96-111 is n+n; 128-191 HI detector

Run 13:  alpha source in fromt of dE detector (0-63). All detectors connected.

• 0-15 OK
• 16-31 OK
• 32-47 pulser appears at higher amplitude, alphas in a similar spot
• 48-63 OK
• 64-79 ch64 low gain but only for pulser (alphas look fine)
• 80-95 ch83 low gain, ch88 bad resolution. some strips show alphas
• 96-111 ch102 no alphas, ch103 low gain
• 112-127 pulser OK
• 128-191 (HI detector) looks ok
•  
•  

dE Layer is Removed

Run 15:  alpha source in front of E detector, no dE

• 0-15 OFF
• 16-31 OFF
• 32-47 OFF
• 48-63 OFF
• 64-79 ch64 low gain but only for pulser (alphas look fine)
• 80-95 ch83 low gain, ch88 bad resolution.
• 96-111 ch102 no alphas, ch103 low gain
• 112-127 OK

Run 16: alpha source in front of E detector, no dE

• 0-15 OFF
• 16-31 OFF
• 32-47 OFF
• 48-63 OFF
• 64-79 ch64 low resolution, low gain but only for pulser
• 80-95 ch83 low gain, ch88 bad resolution.
• 96-111 ch102 /ch103 problem
• 112-127 OK

Run 18 does not seem to be in Run book

Run 18: alpha source in front of E detector,

• 0-15 OFF
• 16-31 OFF
• 32-47 OFF
• 48-63 OFF
• 64-79 ch64 as Run 16
• 80-95 ch83 as Run 16
• 96-111 alphas there but there are two pulser peaks in all segments, and a lot of alpha peaks...
• 112-127 OK

Run 19: same settings as Run 16

• 0-15 OFF
• 16-31 OFF
• 32-47 OFF
• 48-63 OFF
• 64-79 ch64 as Run 16
• 80-95 ch83 as Run 16
• 96-111 102/103 empty/low gain
• 128-143 OK
• 144-159 152-154 low resolution
• 160-175 OK
• 176-191 OK

For later runs the information is taken from logbook as no runs have been saved:

Run 23: E detector switched to #2951-22

• 0-15 OFF
• 16-31 OFF
• 32-47 OFF
• 48-63 OFF
• 64-79 ch64 as Run16
• 80-95 ch83 as Run 16
• 96-111 102/103 empty/low gain
• 112-127 OK

Run 24 Cable for 1 mm E detector must be faulty; Check new cable

• 64-79 OK
• 80-95 ch 83 low gain
• 96-111 ch 101, ch 103 low gain 
• 112-127 OK

POINTS FOR DISCUSSION

• Email sent to Karl and Olof about 
• FC at end of SEC
• Gain resistor package
• Network access
• N2 gas

To ask still:

• date for connection of SEC to our chamber
• collimator in front of chamber ?

No reply, remind next week, best by phone

2) Parts to be prepared in Edinburgh

• -Iris under construction, add. stop so it does not close all the way. coming along nicely. might have to increase detector distance a bit for safety. 
• spare feedthrough for cooling, to be done
• Al degrader: We have 15 um and 8 um in Edinburgh, Daid will check if light-tight. We dont have 8, but we have 10 and 6 um which should both be possible. We will prepare one 15, one 8 and on 6, possibly backups. Check what it would do for straggling if there is no hole in the middle of the foil. use 20 mm cookie cutter for circle. earth foils? Tom: Make hole, we have frames. 
• Photo diodes x2 along with degrader foil: PCB for photodiodes. extra holes for ladder. coming along. 2 diodes need a bit less than 2 space, 10 spaces in total, maybe 11. 
• Faraday cup SHV to SMA converter: Peter to order
• Window port for front of chamber? Peter to draw
• Extra ribbon cables are needed? Need short cables detector to preamp. Also need long ribbon cables. Peter will make 2 new ones
• Photographs and diagrams of experimental setup -- organized clearly for beam operators during tuning: add technical drawing on elog Peter will make it coherent. Safety Folder/Risk Assessment. Safety Datasheets (Ethanol). 
• Alignment -- 2 end caps and one target ladder mount for optics reflector (8 mm diameter?) For survey people. Peter: two ends are done, drawings for S2 and target ladder mountain points not made yet. 
• Adjustable feet to be produced for radial alignment: Peter / Toby

3)Decisions / Analysis

• Alpha analysis: dE and HI detectors seem ok, We need spare cables for Detector to preamplifier. 
• Sort Routine: Tom will provide sort routine and test file to look at real data.
• Target ladder config finalization: 2 photodiodes, collimator (what size, we have 3 mm and 10mm), Beam viewer,  3 CH2 and 2 Carbon.
• Calibration of Target ladder positions. Peter / Daid
• CH2 and C sample choice. So far CH2 Target 1: 30+25 (480ug/cm2); CH2 Target 2: 16 (400 ug/cm2)

Email sent to Karl and Olof about 

• FC at end of SEC
• Gain resistor package
• Network access
• N2 gas
• date for connection of SEC to our chamber
• collimator in front of chamber ?

Next week call Karl. Daid will look at old Olof emails

2) Parts to be prepared in Edinburgh

• - Iris under construction, add. stop so it does not close all the way. coming along nicely. might have to increase detector distance a bit for safety. no news
• spare feedthrough for cooling, to be done
• Al degrader: We have 15 um and 6&10 um in Edinburgh, Daid will check if light-tight. We will prepare one 15, one 10 and on 6, possibly backups. Make hole, we have frames. more frames
• Photo diodes x2 along with degrader foil: PCB & photodiodes here. extra holes for ladder. coming along. 2 diodes need a bit less than 2 space, 10 spaces in total, maybe 11. drawings there. Preamps, amps? ask Tom
• Faraday cup SHV to SMA converter: Peter on order
• Window port for front of chamber? Peter to manufacture
• Extra ribbon cables are needed? need to check with calibration. Also need long ribbon cables. Peter will make 2 new ones. Peter has bits
• Photographs and diagrams of experimental setup -- organized clearly for beam operators during tuning: add technical drawing on elog Peter will make it coherent. Safety Folder/Risk Assessment. Safety Datasheets (Ethanol). send to Karl
• Alignment -- 2 end caps and one target ladder mount for optics reflector (8 mm diameter?) For survey people. Peter: two ends are done, drawings for S2 and target ladder mountain points not made yet. 
• Adjustable feet to be produced for radial alignment: Peter / Toby

3)Decisions / Analysis

• Alpha analysis: dE and HI detectors seem ok, We need spare cables for Detector to preamplifier. 
• Sort Routine — ask Tom
• Target ladder config finalization: 2 photodiodes, collimator (what size, we have 3 mm and 10mm), Beam viewer, We need to verify how many positions we have. 3 CH2 and 2 Carbon.
• Calibration of Target ladder positions. Peter / Daid
• CH2 and C sample choice. So far CH2 Target 1: 30+25 (480ug/cm2); CH2 Target 2: 16 (400 ug/cm2). Check combination 33+1+10. New Ch2 from Paul —> Check thickness asap!

CERN-Edinburgh Liaison

• FC at end of SEC: manual
• Network access: port free.
• N2 gas ? 
• -date for connection of SEC to our chamber: week 30. October, 2nd November alignment. 
• collimator in front of chamber ?? contact Jorge Alberto about beam tuning in general (maybe add contingency high energy point) ? cc Karl

look for 4 deliveries: 2 bags gain resistors, 1 box luvac, 1 box farnell

2) Parts to be prepared in Edinburgh

• Iris: no news should be done today
• spare feedthrough for cooling, to be done.
• Al degrader: we have 2x10, 2x15 um (hole in center and light checked). 6 um still to prepare, 20 um maybe. mounts to be delivered.  
• Photo diodes x2 along with degrader foil: PCB & photodiodes here. extra holes for ladder.  drawings there. making degrader foil holder.  target ladder remade.  Preamps, amps? ask Tom. Cocknell preamp tested. 20 mv/MeV (250 MeV max). maybe borrow some more amps from miniball. 
• Faraday cup SHV to SMA converter: needs to be glued together
• Window port for front of chamber? Peter to manufacture
• Extra ribbon cables are needed? need to check with calibration. Also need long ribbon cables. will be done today/tomorrow
• Photographs and diagrams of experimental setup -- organized clearly for beam operators during tuning: add technical drawing on elog Peter will make it coherent. Safety Folder/Risk Assessment. Safety Datasheets (Ethanol).
• Alignment -- 2 end caps and one target ladder mount for optics reflector (8 mm diameter?) For survey people. Peter: two ends are done, drawings for S2 and target ladder mount points are at workshop
• Adjustable feet to be produced for radial alignment: Toby, almost done
• degrading of 12C - on elog. 

3)Decisions / Analysis

• Alpha analysis: dE and HI detectors seem ok, We need spare cables for Detector to preamplifier. 
• Sort Routine — Ruchi +Alex+Tom
• Target ladder config finalization: 2 photodiodes, collimator (what size, we have 3 mm and 10mm), Beam viewer, 3 CH2 and 2 Carbon.
• Calibration of Target ladder positions. Peter / Daid
• CH2 and C sample choice. So far CH2 Target 1: 30+25 (480ug/cm2); CH2 Target 2: 16 (400 ug/cm2). Check combination 33+1+10. New Ch2 from Paul - all will be sent here

4) CERN Presence:

• Ruchi: 22 Oct - ~20 Nov
• Mirco: 22-27 Oct, 5- ~20 Nov ?
• Claudia: 22-27 Oct, 5- ~20 Nov
• Daid: from 30 Oct
• Peter: from ~1 Nov
• Toby: from 30 Oct 
• Alex 6-11 Nov
• Tom 8- ?? Nov

Sarah: 8 - ?? Nov

0) If target or line drop, STOP THE BEAM!!

1) If you SEE target or line current go down (top right window of monitors next to the corridor): 

Use Knobs open application (monitor below); remember set value; type 0 in set window; click Mode - Reset; click Mode - On. increase current in steps of 100 A

2) If Target or line current off and it happened a while ago

Use Knobs open application (monitor below); type 0 in set window; click Mode - Reset; click Mode - On Use Isolde Target heating GPs application (in monitor below);

Thresholds of RAL amplifiers set to: dE 30mV; E 20 mV, HI 20 mV

There is an option to see when the beam is gone if it is due to lasers or due to the accelerator.

- window next to proton requestion switch

- put middle faraday cup in

- switch mass to stable copper 63Cu

- check faraday cup current. should be around 1-3 nA

- switch back to 59Cu

-Faraday Cup out

- further descption is on a piece of paper upstairs