HCal Status Update

Scott Barcus, Juan Carlos Cornejo, and the HCal Working Group

November 9th 2020

Jefferson Lab

Coda 3 Upgrade

• Completed.

• In the process of upgrading DAQ to CODA 3. (Thanks, Bryan!)

– New CODA configuration written.

– DAQ readout lists almost updated.

– About to install final VXS crate. (Thanks, Alex!)

• Need to test CODA 3 on cosmic data as final test.

1

Coda 3 Upgrade Cont.

• DMA transfer terminated by unkown BUS error.

2

PMT Greasing

• Juan Carlos Cornejo came to Jlab and greased the HCal PMTs.

• 9 PMTs need to be finished. 2 need to be aligned.

3

Ensuring HCal PMTs are Light Tight

• After greasing reapplied tape to PMT bases to prevent light leaks.

4

Cosmic Testing Reestablished

• Final VXS crate installed.

• Cosmics retimed for fADCs.

• Now able to run cosmics remotely.

– Remote VXS crate power cycling.

5

LED System Work

• HCal has a series of 6 LEDs that can illuminate each PMT.

• Powered by 8 LED power boxes on front-end (4 completed).

• Each LED power box controls 2 LED boxes on the sides of HCal (all

16 completed).

LED Power Boxes LED Boxes

6

LED System Work Cont.

• New HV cables (thank Chuck!).

• New LED pulse signal cable bundles.

• LEDs control boards use clock and data in signals.

• Retimed fADCs for LEDs (still need to retime F1TDCs).

Clock = Blue, Data = Yellow Retiming LEDs

7

LED System Work Cont.

• Left half HCal LEDs operational now.

12×6 Rows of PMT fADC Signals

8

Other Work Since Last Update

• New HCal cable maps for HV and DAQ.

• Updated HAlist for HCal test lab setup.

• fADCs inventoried.

• DNP HCal talk.

• Left half amplifier power crate occassionally has issues turning on.

May want to replace just in case.

• Tested summing amps.

– All appear operational. Half of one amp broken → swapped out.

– Still need to test as trigger with cosmics.

• Running cosmics at different HV for signal calibration.

– Vanessa and Sebastian working on.

• Energy deposition simulation studies.

9

Energy Deposition Simulation Studies

• Sebastian Seeds has been studying energy deposited in the

scintillators from protons and neutrons with G4SBS.

– Protons and neutrons incident on HCal in 1 GeV increments.

Proton FitsHarmEsum1_p

Entries 16253

Mean 0.03998

Std Dev 0.01473

0 0.02 0.04 0.06 0.08 0.1 0.12 0.140

100

200

300

400

500

600

HarmEsum1_p

Entries 16253

Mean 0.03998

Std Dev 0.01473

Harm Detector ESum, Incident Proton 1 GeV

HarmEsum2_p

Entries 18858

Mean 0.1037

Std Dev 0.03694

0 0.05 0.1 0.15 0.2 0.250

100

200

300

400

500

HarmEsum2_p

Entries 18858

Mean 0.1037

Std Dev 0.03694

Harm Detector ESum, Incident Proton 2 GeV

HarmEsum3_p

Entries 18892

Mean 0.1713

Std Dev 0.05802

0 0.05 0.1 0.15 0.2 0.25 0.3 0.350

100

200

300

400

500

HarmEsum3_p

Entries 18892

Mean 0.1713

Std Dev 0.05802

Harm Detector ESum, Incident Proton 3 GeV

HarmEsum4_p

Entries 18690

Mean 0.2403

Std Dev 0.07985

0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.50

100

200

300

400

500

600HarmEsum4_p

Entries 18690

Mean 0.2403

Std Dev 0.07985

Harm Detector ESum, Incident Proton 4 GeV

HarmEsum5_p

Entries 18491

Mean 0.3027

Std Dev 0.1034

0 0.1 0.2 0.3 0.4 0.5 0.60

100

200

300

400

500

HarmEsum5_p

Entries 18491

Mean 0.3027

Std Dev 0.1034

Harm Detector ESum, Incident Proton 5 GeV

HarmEsum6_p

Entries 18200

Mean 0.3645

Std Dev 0.1251

0 0.1 0.2 0.3 0.4 0.5 0.6 0.70

100

200

300

400

500

HarmEsum6_p

Entries 18200

Mean 0.3645

Std Dev 0.1251

Harm Detector ESum, Incident Proton 6 GeV

HarmEsum7_p

Entries 17908

Mean 0.423

Std Dev 0.1503

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80

100

200

300

400

500

HarmEsum7_p

Entries 17908

Mean 0.423

Std Dev 0.1503

Harm Detector ESum, Incident Proton 7 GeV

HarmEsum8_p

Entries 17583

Mean 0.4872

Std Dev 0.1718

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.90

100

200

300

400

500

HarmEsum8_p

Entries 17583

Mean 0.4872

Std Dev 0.1718

Harm Detector ESum, Incident Proton 8 GeV

HarmEsum9_p

Entries 17250

Mean 0.5478

Std Dev 0.1976

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 10

100

200

300

400

500

HarmEsum9_p

Entries 17250

Mean 0.5478

Std Dev 0.1976

Harm Detector ESum, Incident Proton 9 GeV

HarmEsum10_p

Entries 17099

Mean 0.6109

Std Dev 0.2227

0 0.2 0.4 0.6 0.8 10

100

200

300

400

500

HarmEsum10_p

Entries 17099

Mean 0.6109

Std Dev 0.2227

Harm Detector ESum, Incident Proton 10 GeV

Neutron FitsHarmEsum1_p

Entries 16253

Mean 0.03998

Std Dev 0.01473

0 0.02 0.04 0.06 0.08 0.1 0.12 0.140

100

200

300

400

500

600

HarmEsum1_p

Entries 16253

Mean 0.03998

Std Dev 0.01473

Harm Detector ESum, Incident Proton 1 GeV

HarmEsum2_p

Entries 18858

Mean 0.1037

Std Dev 0.03694

0 0.05 0.1 0.15 0.2 0.250

100

200

300

400

500

HarmEsum2_p

Entries 18858

Mean 0.1037

Std Dev 0.03694

Harm Detector ESum, Incident Proton 2 GeV

HarmEsum3_p

Entries 18892

Mean 0.1713

Std Dev 0.05802

0 0.05 0.1 0.15 0.2 0.25 0.3 0.350

100

200

300

400

500HarmEsum3_p

Entries 18892

Mean 0.1713

Std Dev 0.05802

Harm Detector ESum, Incident Proton 3 GeV

HarmEsum4_p

Entries 18690

Mean 0.2403

Std Dev 0.07985

0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.50

100

200

300

400

500

600HarmEsum4_p

Entries 18690

Mean 0.2403

Std Dev 0.07985

Harm Detector ESum, Incident Proton 4 GeV

HarmEsum5_p

Entries 18491

Mean 0.3027

Std Dev 0.1034

0 0.1 0.2 0.3 0.4 0.5 0.60

100

200

300

400

500

HarmEsum5_p

Entries 18491

Mean 0.3027

Std Dev 0.1034

Harm Detector ESum, Incident Proton 5 GeV

HarmEsum6_p

Entries 18200

Mean 0.3645

Std Dev 0.1251

0 0.1 0.2 0.3 0.4 0.5 0.6 0.70

100

200

300

400

500

HarmEsum6_p

Entries 18200

Mean 0.3645

Std Dev 0.1251

Harm Detector ESum, Incident Proton 6 GeV

HarmEsum7_p

Entries 17908

Mean 0.423

Std Dev 0.1503

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80

100

200

300

400

500

HarmEsum7_p

Entries 17908

Mean 0.423

Std Dev 0.1503

Harm Detector ESum, Incident Proton 7 GeV

HarmEsum8_p

Entries 17583

Mean 0.4872

Std Dev 0.1718

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.90

100

200

300

400

500

HarmEsum8_p

Entries 17583

Mean 0.4872

Std Dev 0.1718

Harm Detector ESum, Incident Proton 8 GeV

HarmEsum9_p

Entries 17250

Mean 0.5478

Std Dev 0.1976

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 10

100

200

300

400

500

HarmEsum9_p

Entries 17250

Mean 0.5478

Std Dev 0.1976

Harm Detector ESum, Incident Proton 9 GeV

HarmEsum10_p

Entries 17099

Mean 0.6109

Std Dev 0.2227

0 0.2 0.4 0.6 0.8 10

100

200

300

400

500

HarmEsum10_p

Entries 17099

Mean 0.6109

Std Dev 0.2227

Harm Detector ESum, Incident Proton 10 GeV

10

Energy Deposition Simulation Studies Cont.

2 4 6 8 10E Incident Hadron [GeV]

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

E D

epos

ition

in H

CA

L S

cint

illat

or [G

eV]

Protons

Neutrons

Proton and Neutron Energy Deposition in HCAL Scintillator vs Incident Hadron Energy

11

General DAQ/Software Status

Completed:

• All DAQ electronics tested and working.

– Except summing modules require testing.

• Operational decoder and readout lists (CODA 2→CODA 3).

• Full database implemented.

• Available Triggers:

– Cosmic trigger.

– LED pulser trigger.

• Flags file to configure ROCs (switch between triggers, set windows,

prescales, etc).

– Standardize across subsystems? GUI?

• Event display available.

• Simple cluster finding algorithm implemented (max energy module).

– More advanced algorithm under development. (e.g. associates

regions of BB with regions of HCal.)

12

General DAQ/Software Status

To-do:

• PMT QE calibration requires more LED data (test lab).

• Calibrate NPE to ADC signal (test lab).

• In Progress:Calibrate HV to ADC signal (test lab).

• In Progress:Test summing module trigger (test lab).

• Implement online monitoring software (maybe mimic Hall C).

– fADC250 scaler mode. GUI exists (ask Steve Wood?).

• Determine alarm handler information.

– HV alarms etc.

• Setup HCal in the hall.

– Reestablish DAQ.

– Synchronize timings.

13

Hardware Status

Completed:

• All front-end electronics, cables, patch panels etc. installed and

operational.

To-do:

• In progress: 9 remaining.

• Need to finish greasing PMTs.

– Calibrations can’t be finalized until this is completed.

– Requires test lab access.

– Unless we have a volunteer who can access the test lab, Scott will do

this when authorized to enter.

– Hopefully granted access when JLab enters SAD.

• Assemble 4 remaining pulser boxes (CMU).

• Fabricate remaining 3 shims that go between the 4 subassemblies.

Other 20 installed already (JLab).

• Move to Hall A and revive the DAQ system.

• Install dry air supply for PMTs in the hall. 14

Current Status Summary

• DAQ operational and detector fully assembled.

• Cosmics/calibrations will resume when test lab access is restored.

• To do: https://docs.google.com/document/d/

1S--OKOlQLOgP-EP-2nf8LSBLx6Y6d6TAFrWK1UkRxBE/

– 279/288 Grease remaining PMTs.

– Ongoing Calibrate relative PMT QEs.

– Ongoing Voltage scans.

– Ongoing Calibrate PMTs with

cosmics.

– Soon Simulation cosmics vs. real.

– Completed Finish CODA 3 upgrade.

– Online monitoring.

– Analysis scripts.

– Assemble remaining pulser boxes.

– Fabricate shims.

– Move to Hall A.

– Install dry air supply.

• Personnel:

– 2 postdocs: Scott Barcus and Juan Carlos Cornejo.

– 2 students: Vanessa Brio and Sebastian Seeds. Possibly a third.

– Brian Quinn and Bogdan Wojtsekhowski.

– New collaborators: Jim Napolitano, Donald Jones, and Kent

Paschke.

15

Acknowledgments

Thanks to Gregg Franklin for his many dedicated years designing and

overseeing the construction of HCal. Thanks to Universita di Catania for

their major financial contributions. Many other people and institutions

were involved in making HCal possible, including, but not limited to:

• Thanks to the many students who have worked on HCal including

Alexis Ortega, So Young Jeon, Jorge Pena, Carly Wever, Dimitrii

Nikolaev, and Sebastian Seeds.

• Thanks to Alexandre Camsonne for helping us get the DAQ working

and finding all the modules for us.

• Thanks to Chuck Long for all his help fixing and acquiring things.

• Thanks to Bryan Moffit for DAQ help.

• Thanks also to Brian Quinn and Bogdan Wojtsekhowski.

• Thanks to Vanessa Brio, Cattia Petta, and Vincenzo Bellini for their

cosmic commissioning efforts.

16

Questions?

17