R & D for Hall D Project

This is for planning R &D projects for year one. We hope money will be available early in 2000. These are tentative but useful to get the discussion going. Please make your input. We will prepare a document detailing
R & D plans for 2000 and 2001 well in advance of the Hall D Review.

Preliminary R&D Budget for discussions with Hermann (November 12, 1999) PDF

Institution	Project	Link for more details	Amount ($K) Y1 = 2000 Y2 = 2001 2yr = both total [salaries]
Carnergie Mellon	straw tubes and dE/dx	here	Y1: 71.7 [49.2] Y2: 152.4 [89.2]
Catholic U	-	-	-
U Connecticut	diamond radiator tests for coherent brem at ANL or BNL	here	Y1:15(4) Y2: 45 (4)
FIU/Old Dominion	scifi and start counter	here	Y1: 85.7
Florida State U	-	-	-
Indiana/IHEP	TOF and pileline FADC's	here	Y1: 123.5 [30]
LANL	-	-	-
Moscow State	-	-	-
Novosibirsk	magnets ?	-	-
Ohio U	-	-	-
U of Regina	barrel calorimeter	here	Y1: 51.2 [20]
Rennselaer	Cerenkov counter	here	2yr: 172 [80]
Norfolk State	Calorimetry R&D	-	Y1: 55 [40]
JLab/Christopher N	pipeline TDC's / DAQ	from G Heyes from Elton	Y1: 30
Theory Group	Workshops et al	here	Y1:64 [12] Y2: 64[12]

News and Updates:

Elton and others are organizing a Hall D mini-workfest on electronics at JLab for Nov 8-9. Discussion items will include:

• Design parameters for electronics/DAQ (see below)
• Block diagrams for Front-end track counts and energy sums. Better definition of what inputs provide the information and how to provide information to the global trigger collector.
• Block diagram for global trigger collector.
• R&D

• Update on DAQ R&D: Graham Heyes has written up a draft proposal for developments within the JlabDAQ group for the next several years.
• Coordination with Fast Electronics: Fast Electronics group (Fernando in particular) is interested in contributing toward the development of the high resolution pipeline TDC effort. Fernando, Elton and Chris will meet on Friday afternoon to discuss their interest.
• Global Trigger: Dave Doughty has a general scheme for the trigger, which suggested critical design parameters as well as some areas for R&D. Use global 250 MHz clock for 64-bit counter for global distribution an assembly of event segments.
  • 250 MHz (<1ns slew) clock distribution and synchronization - Ed Jastrzembski is working on similar developments within the DAQ group
  • Fiber Links and information distribution (Front-end crates to Global Trigger) - DAQ group is working on related issues
  • Trigger match window length (512 ns?)
  • Trigger latency (goal ~1-2micro sec?)
  • Logic for Global Trigger (FPGAs?)
• Carlos Salgado added that a technical university in Montevideo, Uruguay is quite interested in working on electronic/DAQ projects with us. He will pursue contacts and avenues to help coordination of R&D efforts which might benefit them and Hall D.

• Richard Jones is looking into R&D for evaluating diamond crystals - getting some samples and measuring rocking curves at a light source - BNL or ANL. He is discussing this with C. Sinclair.
• Elton spoke to Arne about the coherent bremstrahlung source in Hall B and here is his summary. It might be useful in making plans for Hall D.
  • Goniometer. $50K, built by Huber (Newport also bid on the project). Includes 3 translation and 3 rotation stages. Assembly is quite massive because it includes the stage assemblies and motors.
  • Vacuum box, ~20K, build by Jlab accelerator. Includes ports for vacuum pumps and the many electrical connections for the goniometer motors (+ spares)
  • Slow controls. ~10K, includes VME crate + electronics.
  • Additional electronics for tagger focal plane. ~40K, primarily includes VME 384 VME scaler channels for the tagger E-counters.
  • Diamonds. ~2K/piece, so far all natural diamonds (100 microns), would prefer thinner 50 micron thickness.
  • Active collimator. simulations done, but not complete built yet. Notes: A dead Ni collimator is ~10K, active would require additional detectors + readout. Translation stage for Hall D, preferably horizontal and vertical alignment might be 40-50K??
  • R&D: A group from Glasgow has been characterizing the diamonds for Hall B using their x-ray source. They would like to continue using their source to study synthetic diamonds (~300 microns). Future work would concentrate on producing thinner crystals and being able to measure their characteristics.
• Alex has had an exchange with Peter Kasper of Femilab who recently has some success with coherent bem at FNAL. He is happy to talk with us. Perhaps several of us should have a brief get together at FNAL.

Carlos and Alex discussed yesterday the desirability of having a meeting sometime in the future at JLab to discuss calorimetry issues for Hall D in general. This would include:

• using powdered absorbers for compact calorimetry - Carlos has NASA funding for this
• TOF from barrel calorimetry (U Regina doing some work)
• use of lead tungstate or lead flouride
• total absorption calorimeter - IU is working on a heavy liquid calorimeter using LST
• explore ways of working with the instrumentation group at JLab

Andi Klein and Werner Boeglin have been put in contact with John Krider at FNAL by Alex. John is the engineer for the D0 scintillating fiber project there and has offered to consult with Hall D. Andi and Werner will prepare an R&D budget.