Revision as of 20:05, 31 January 2017

Go back 2nCor_44

Apparatus Map

2016-2017 IAC run on the 44 machine

Signal cable timing

ToF test with CF-252

Neutron&photon_rates_with_CF252

Detector layout

The Xfig file for old figure (not this one) : Media:2nCorApp_081216.xfig.txt

Map for detectors-cables-TDC channels- ROOT variable

Detector	Phi Angle (Degrees)	PMT Position	Signal cable label	HV cable label	HV channel on Lecroy Mainframe	LED CH	VNIM-ECL channel	ROOT variable
D30	30	Top	D30T001	SHV101	4:L0.1	0	A-0	evt.TDC[hit #][1]
D30	30	Bottom	D30B002	SHV102	4:L0.2	1	A-1	evt.TDC[hit #][2]
D60	54	Top	D54T2.1
D60	54	Bottom	D54B2.2
D90	78	Top	D78T0.3	SHV103	4:L0.3	2	A-2	evt.TDC[hit #][3]
D90	78	Bottom	D78B0.4	SHV104	4:L0.4	3	A-3	evt.TDC[hit #][4]
D120	102	Top	D120T201	SHV201	5:L1.1	8	B-0	evt.TDC[hit #][9]
D120	102	Bottom	D120B202	SHV202	5:L1.2	9	B-1	evt.TDC[hit #][10]
D126	126	Top	D126T1.9
D126	126	Bottom	D126B1.10
D150	150	Top	D150T005	SHV105	4:L0.5	4	A-4	evt.TDC[hit #][5]
D150	150	Bottom	D150B006	SHV106	4:L0.6	5	A-5	evt.TDC[hit #][6]
D210	210	Top	D225T007	SHV107	4:L0.7	6	A-6	evt.TDC[hit #][7]
D210	210	Bottom	D225B008	SHV108	4:L0.8	7	A-7	evt.TDC[hit #][8]
D234	234	Top	D234T2.3
D234	234	Bottom	D234B2.4
D258	258	Top
D258	258	Bottom
D282	282	Top	D282T1.7
D282	282	Bottom	D282B1.8
D306	306	Top	D306T1.3	SHV203	5:L1.3	10	B-2	evt.TDC[hit #][11]
D306	306	Bottom	D306B1.4	SHV204	5:L1.4	11	B-3	evt.TDC[hit #][12]
D330	330	Top	pch. pnl. 223E1	shv205	5:L1.5		B-4	evt.TDC[hit #][13]
D330	330	Bottom	pch. pnl 223E7	shv206	5:L1.6		B-5	evt.TDC[hit #][14]
200 ns Pulse								R1DC->Draw("(evt.TDC1190[2][16]-evt.TDC1190[1][16]

Detectors

PMTs

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

Scintillators

e+e- spectrometer

PNNL HpGe X-cooler

PNNL_X-coolerII-GEM120P4

Detector As Built

File:TwoNDetector.pdf

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.

Accelerator

Beam spot flags

Below is a picture of the three "flags" that you can use to the beam spot size using a phosphorus screen.

Software

here is the raw C code for "evio2nt", which is the program we use to create a ROOT tree from a .dat file.

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

@@ Line 31: / Line 31: @@
 ||Bottom ||D54B2.2  ||     || || || ||
 |-
-|rowspan="2" | D90 ||  rowspan="2"|78 || Top ||  D90T003 ||    SHV103 ||4:L0.3 ||2 ||A-2 ||  evt.TDC[hit #][3]
+|rowspan="2" | D90 ||  rowspan="2"|78 || Top ||  D78T0.3 ||    SHV103 ||4:L0.3 ||2 ||A-2 ||  evt.TDC[hit #][3]
 |-
-||Bottom  ||D90B004  ||SHV104     ||4:L0.4 ||3 ||A-3 ||  evt.TDC[hit #][4]
+||Bottom  ||D78B0.4  ||SHV104     ||4:L0.4 ||3 ||A-3 ||  evt.TDC[hit #][4]
 |-
 | rowspan="2" | D120 ||  rowspan="2"|102 || Top ||D120T201 ||SHV201    ||5:L1.1 ||8 || B-0|| evt.TDC[hit #][9]

Difference between revisions of "2nCor Equipment"