Version 76 (modified by 4 years ago) (diff) | ,
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Time of Flight
SVN: http://gauss.bu.edu/svn/tof-system/
Two experiments:
- "Regular Helium Atom Scattering" (using microchannel plate) Diagram (diagram with box photos)
- "Metastable Helium Atom Scattering" (using channeltron) Diagram (diagram with box photos)
Meetings
- ToFPCBComments13Dec2019
- TofPCBComments05Dec2019
- TofPCBComments27Nov2019
- TofMeeting22Oct2019
- TofMeeting17Sep2019
Notes on testing
- HV Pusler RevA 1/16/20
- LV Mixer RevA 1/24/20
- Filament Supply RevA 1/31/20 Disregard this, the wrong transistor was used during testing.
Full Testing
- Filament Supply Full Test 2/6/20 Testing DC-Conditions
- Filament Supply Full Test 2/7/20 Testing Pulsing
- LV Mixer Full Test 2/13/20 Testing Mixing at Increasing Speeds
- HV Pulser Full Test 2/25/20 Testing Pulsing at Increasing Speeds
- PreAmp Full Test 2/27/20 Testing amplification and discrimination
RevB Testing
- HV Rev Testing ToF adapter RevB -> HV RevB -> Filament Supply RevB
SETUP
- PreAmp Setup
- ToF Adapter Setup
- HV Pulser Setup
- LV Mixer Setup
- Filament Supply Setup
- Firmware Setup
Notes on Revisions
- LV Mixer: RevB
- HV Pulser: RevB
- ToF Adapter: RevB checked, needs fixes ESH 3/2/20
- Filament Supply: RevB checked, ok ESH 3/2/20
- Pre-Amp: ELBAT_Preamp_RevA RevA
- Firmware: RevB
PCB Documentation
Rev A boards ordered Dec 2019:
- TOF box adapter
- LV pulser/mixer
- HV pulser
- Filament supply
The following boxes/instruments need to be constructed for Xuetao in 2019:
Regular Helium
- TOF box (pulse output and TDC input NewTOFBox
- Filament supply (same as BU) NewFilamentSupply
- Quad PS (commercial power supplies)
- LV pulser (same as BU) NewLVMixer
- Preamplifier (need input signal specs) NewMCPPreamp
Metastable Helium
- TOF box (pulse output only, no detector readout) NewTOFBox
- Trigger signal out to TDC
- Filament PS for Exciter (? not sure) ~1A for indirectly heated cathode NewFilamentSupply
(one fil. end is at Cathode potential)
- Can be same supply as for regular helium e-gun, pulsed at 200V
- 200V bias supply for HV pulser
- HV pulser (Bill's design with transformers) NewHVPulser
- Update design if needed ("high-side" FET drivers?)
Older version of list for BU
- TOF box
- FPGA board with pseudo-random pulser and TDC; controlled via USB/serial I/F
- Pulse input from detector preamp (also supplies preamp power)
- 0..-25V manually adjustable supply for cathode offset (with panel meter)
- Filament supply
- Isolated supply, 0-3A constant current (?)
- HV Pulser / Mixer
- LV Pulser / Mixer
- Preamp (MCP)
- Preamp (Channeltron)
- E-Gun power supply
On 5/30/19, Michael visited. He says only the first 4 boxes are needed. Xuetao will not use the Channeltron because he has a huge MCP.
For the "Regular" experiment, we use the MCP preamp and LV pulser
For the "Metastable" experiment, we use the Channeltron preamp and HV pulser
Photos (by board/box):
Photos (raw):