Difference between revisions of "2nCor Equipment"

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{| border="1"
 
{| border="1"
|Detector || Angle|| PMT Position||Signal cable label  || HV cable label || HV channel on Lecroy Mainframe ||NIM-ECL channel||  TDC channel|| ROOT vaiable
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|Detector || Angle|| PMT Position||Signal cable label  || HV cable label || HV channel on Lecroy Mainframe ||NIM-ECL channel||  TDC channel|| ROOT variable
 
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|-
 
! rowspan="2" | D30 || ! rowspan="2"| 30 || Top || D30T001 || SHV101    || 4:L0.1||1 ||1|| evt.TDC[1]
 
! rowspan="2" | D30 || ! rowspan="2"| 30 || Top || D30T001 || SHV101    || 4:L0.1||1 ||1|| evt.TDC[1]

Revision as of 18:56, 12 August 2016

Apparatus Map

2016-2017 IAC run on the 44 machine

Detector layout

2nCorApp 081216.png

The Xfig file for the above figure : Media:2nCorApp_081216.xfig.txt


Map for detectors-cables-TDC channels- ROOT variable

Detector Angle PMT Position Signal cable label HV cable label HV channel on Lecroy Mainframe NIM-ECL channel TDC channel ROOT variable
D30 30 Top D30T001 SHV101 4:L0.1 1 1 evt.TDC[1]
Bottom D30B002 SHV102 4:L0.2 2 2 evt.TDC[2]
D60 60 Top
Bottom
D90 90 Top
Bottom
D120 120 Top
Bottom
D150 150 Top
Bottom
D210 210 Top
Bottom
D225 225 Top
Bottom
D240 240 Top
Bottom
D270 270 Top
Bottom
D300 300 Top
Bottom
D330 330 Top
Bottom

Detectors

PMTs

http://www.hamamatsu.com/resources/pdf/etd/R580_TPMH1100E.pdf

Scintillators

e+e- spectrometer

PNNL HpGe X-cooler

PNNL_X-coolerII-GEM120P4

DAQ electronics

Signal Processing

Discriminator

CAEN N841


The pulse forming stage of the discriminator produces an output pulse whose width is adjustable in a range from 5 ns to 40 ns. Each channel can work both in Updating and Non-Updating mode according to on-board jumpers position. The discriminator thresholds are individually settable in a range from -1 mV to -255 mV (1 mV step), via an 8-bit DAC. The minimum detectable signal is -5 mV. The back panel houses VETO and TEST inputs, the OR output and the Current Sum output, which generates a current proportional to the input multiplicity, i. e. to the number of channels over threshold, at a rate of -1.0 mA per hit (-50 mV per hit into a 50 Ohm load) ±20%.

File:CAEN N841 Manual.pdf

LED output pulse width [arb. units] Pulse width seen by the oscscope [ns]
10 6.3
20 6.6
40 7.1
60 7.6
90 8.5
120 9.5
160 12.0
190 15.1
230 24.8
250 43.5

NIM-ECL converter

Phillips Model 726

File:Phillip 726 Nim2ECL.pdf

TDC

TDC VME addresses

TDC1 = 1280

TDC2 = 2391


Detector name convention

BLUT = Beam Left Upstream Top pmt

3/19/15

TDC channel Map (Thursday)
Detector Angle TDC channel NIM-ECL channel Patch Pannel # ROOT vaiable
BLUT 135 TDC 16 in B ch 0 223A6 evt.TDC[16]
BLUB 135 TDC 17 in B ch 1 223A7 evt.TDC[17]
BRT 270 TDC 24 in A ch 0 223A14 evt.TDC[24]
BRB 270 TDC 25 in A ch 1 223A15 evt.TDC[25]
BLDT 45 TDC 26 in A ch 2 223A16 evt.TDC[26]
BLDB 45 TDC 27 in A ch 3 223A17 evt.TDC[27]
Trig Delay TDC 30 in A ch 6 evt.TDC[30]
Photon flux monitor 90 TDC 29 in A ch 5 223A10 evt.TDC[29]

3/24/15

TDC channel Map 3/24/15
Detector Angle Single hit TDC channel LED channel NIM-ECL channel Patch Pannel # ROOT vaiable MultiHit TDC channel
1 top (BRT) 270 24 0 in A ch 0 223A5 evt.TDC[24] 8
1 bottom (BRB) 270 25 1 in A ch 1 223A6 evt.TDC[25] 9
2 top BLDT 45 16 2 in B ch 0 223A7 evt.TDC[16] 0
2 bottom BLDB 45 17 3 in B ch 1 223A8 evt.TDC[17] 1
3 top 60 26 4 in A ch 2 223A9 evt.TDC[26] 10
3 bottom 60 27 5 in A ch 3 223A10 evt.TDC[27] 11
4 top BLUT 135 18 6 in B ch 2 223A11 evt.TDC[18] 2
4 bottom BLUB 135 19 7 in B ch 3 223A12 evt.TDC[19] 3
5 upstream 135 20 10 in B ch 4 223A15 evt.TDC[20] 4
5 downstream 135 21 11 in B ch 5 223A16 evt.TDC[21] 5
6 upstream 135 30 12 in A ch 6 223A17 evt.TDC[30] 14
6 downstream 135 31 13 in A ch 7 223A18 evt.TDC[31] 15
e+ spect 29 9 in A ch 5 223A14 evt.TDC[29] 13
Trig Delay 22 14 in B ch 6 evt.TDC[22] 6

DAQ pics

TDC calibration

03/25/15

Multi hit TDC timing

Wiring Work

  • 3/25/2015
    • Sean and Glen examined all of the signals from detectors 1 through 6
    • We used the signal from the LEMO cables that go directly into the discriminator
    • We also used the scope's Acquire->Average option and set the average to 512; This allowed for a more reliable comparison between signals
      • Note that the threshold can be adjusted and that the average will be biased toward smaller pulse heights if there is a lot of noise
    • Found an RG-62 cable connected between the bottom PMT of Det 3 and the patch panel A10
      • Replaced with RG-58 cable
    • A10 cable also found to be RG-58 from the experiment room to the counting room; Signal on 3B was degraded in the control room
      • Changed to A19 (RG-223 the whole length) and the signal looked similar to the others
    • Found that detector 5 top and bottom both were small and have the ~12 ns ringing
      • Increased voltage to 1500V
      • The non-extending gates from the discriminator will help with this
      • Recommend a gate width of 20 to 25 ns from the discriminator to eliminate double pulsing from ringing on Det 5
      • Should not matter for other detectors
      • Will also not affect high energy neutrons since 6 MeV neutrons are 30 ns ToF at 1 meter
    • When testing was complete, verified that all cables are associated with the appropriate detector
    • Top/Bottom, Upstream/Downstream should not have been reversed for any detectors in the process but that has not been confirmed; this should be correctable in software

SHV Pasternack connector 4100

File:PE4100.pdf

BNC Pasternack connector 4944 RG55

File:PE4044.pdf

ADC

High Voltage Main Frame

Lecroy HV mainfram PS

HV_MainFrame_1458


Channels 4-0 through 4-11 and 5-0 through 5-11 were tested successfully on 03/3/16.

Software

Ntuple maker

To make the Tree containing the TDC, QDC, and PDC data run the following command


source ~/CODA/setup
/home/daq/CODA/CODAreader/ROOT_V5.30/v775v792v785/evio2nt -fr8735.dat >/dev/null

rename the output file to a root file

mv r8735 r8735.root
root -l r8735.root

to draw a histogram for TDC channel 16

DAQ->Draw("evt.TDC[17]>>(4096,0,4096)");


for the multihit TDC data taken with daq2

CODA/CODAreader/ROOT_V5.30/R1DC/evio2nt -fr4516.dat > /dev/null

R1DC->Draw("(evt.TDC1190[1][3])");

R1DC->Draw("(evt.TDC1190[1][6]-evt.TDC1190[2][6])/10>>(4096,-4096,4096)");

On 4/9/2015 the above should be 4000 channel = 400 ns

Analyzing MultiHit TDC runs

setup ROOT on daq 2

source ~/src/root/root-5.34.00/bin/thisroot.csh 

IN run 4481 the time difference between the two fake stop pulses seems to be 205.8 ns


R1DC->Draw("(evt.TDC1190[2][6]-evt.TDC1190[1][6])/10");

The relative time of a hit in detector 1 top is given relative to the first fake stop hit using the command

R1DC->Draw("(evt.TDC1190[1][8]-evt.TDC1190[1][6])/10");

Doing the same plot above but this time sending it to a histogram with 1 ns bins

R1DC->Draw("(evt.TDC1190[1][8]-evt.TDC1190[1][6])/10 >> (1000,0,1000)")

2nCor_44