Summer 2000 HF Beam Test. DAQ proposal. E. Vlassov & T. Camporesi (CERN) Basics: Temporary solution because issue is not test of final readout electronics. Independent hardware to avoid interference with HCAL test in the beam area. Use existing hardware/software as much as possible. Movable setup which can be used in Bld.186 or H2 area.

Tasks Read PMTs signals from beam (very low charge!). To trigger and monitor beam information (scintillators and delay wire chambers). Laser/LED calibration. Source calibration. Control and monitor Nikhef Platform movements.

General layout Ethernet HF Linux Midas ROBOX NIM Lecroy 2774 preampl. Engines (X electrical, Y hydraulic) HF Nikhef Table MWPC Trigger counters Linux Midas ROBOX NIM Lecroy 2774 preampl. CAMAC F B D F I P FASTBUS 1 8 5 Ethernet Spare space

Fastbus electronics Lecroy F1885F ADC 1 96 channels, automatic dual range, 12 bits in each range, 0.05pC/count(*) in low range, 0.4pC/count in high range, 15 bits effectively. 2. Lecroy F1882N ADC 2 96 channels, 12 bits, 0.05pC/count 3. Lecroy multihit TDC 2 96 channels, 1ns/count,16bits 4. Digital input/output registers 3 64 channels in each (*) expect 0.002 pC/Gev,i.e.1 bit= 25 GeV: we need amplification!

Preamplifier Lecroy 2724, 2 compatible with 1880 series ADCs Amplification 160 24 channels, noise<1.5fC, dynamic range >32000. Input impedance 60W. Short cable? Might need AC coupling: will need to test when we get ROBOX (and base!) at CERN We have only 2 preamp boards (48 chan), but can get two more with 1 week notice

HF sourcing HF Source driver ROBOX Multiplexer Electrometer ADC Connection to driver, multiplexer and ADC through RS232 and FASTBUS-CAMAC

Multiplexer and ADC. (for source calibration) Electrometer

Multiplexer/Borer ADC (for Source calibration) Relay multiplexer Nuclear Ent. 9024/S2 64 way 3 pole relay, low thermal EMF<10mkv, driving by 9600/S1 CAMAC module. CAMAC Borer 1241 DC ADC, 11 bits+sign, 7 programmable ranges of sensitivity (20mv –10v). Charge protection – 3 ways: To use 2 unused poles To use 2-nd stage CAMAC multiplexer To modify multiplexer. Half of day job.

Platform Vertical direction: Control – TTL potentials (4 outputs) Position Readout (Heidenhain linear transducer readable via RS232) precision 10 microns Horizontal direction: Control – TTL 5kHz pulses with variable duty cycle. Position readout: resistive wire current readout ( recuperated) precision 1 mm (determined by ADC sensitivity)

What we do not have yet Connectors to ROBOX and preamp Might need more NIM/CAMAC modules from the POOL ( for signal conversions etc.) NEXT STEPs: Commission HF source driver and verify multiplexing scheme Work on ROBOX/preamp setup once we get the ROBOX at CERN from TEXAS Install beam MWPC and trigger counters in H2 From mid-june control units and engines for platform should be available and we will start exercising it (issues: calibration of displacement monitors, stability/reproducibility of hydraulic system)