Hall D Project Action Item Tracker
DRAFT November 20, 2007 DRAFT








Item System WBS Responsible Action Item Status/Response Target Date Close-out Date









Review
Aschenauer Hall D PID Review
2/18/2008

Review
Aschenauer Hall D Tracking Review
3/31/2008

Review
Aschenauer Hall D System Review
5/15/2008

Review
DOE Lehman Review
6/1/2008









Solenoid 1.5.1 Biallas testing after fixes (single coil tests)






mapping of solenoid and impact on schedule / strategy for alignment











FDC 1.5.2.1.1 Carman validation of current cathode design (decissions: photon conversion, hit and momentum resolution
10/1/2008




develop decission criteria: photon conversion, hit and momentum resolution & other criteria
12/20/2007




specify information and precision per cathode pulse output






analyse Hall-B cosmic data
12/20/2007




alternative designs ---> wire chamber
10/1/2008




cooling of front end cards (2W / card 24ch)
1/4/2008




construct a full scale prototype
06/30/2007




test front end boards on small prototype; get input on shaper specs. for FADC
< 12/17/2007




100MHz FADC
01/30/2008




preliminary design for the HVTB, STB
12/21/2007




asic input needed
02/28/2008




Insertion/alignment tolerances
1/3/2008




alignment monitoring system for FDC/CDC
1/3/2007









CDC 1.5.2.1.2 Meyer dE/dx specifications
01/31/2008




send all the equipment needed to do tests on the preamp board to CMU
11/30/2007




time resolution requirements; specify information and precision per pulse output
12/20/2007




test front end boards on prototype; get input on shaper specs. for FADC
< 12/17/2007




electronics design and space required for feedthroughs and gas distribution
02/15/2008




capacitive coupling scheme
02/28/2008




Electronics heat load / cooling scheme; Fernado does some measurments on air cooling of a 24 ch card.
03/30/2008




insertion / alignment tolerances (coupling between CDC & FDC)
1/3/2008




Finalize straw tube config.; length of CDC vs number of FDC packages
1/3/2008




final HV distribution board
01/31/2008




final cable for fdc and cdc (perfomance on crosstalk, impetance , ...)
01/31/2008









Start 1.5.2.1.3 Boeglin? Decide on PMT's vs. SiPm's
3/1/2008




revise geometry / segmentation for consistency with current cdc/target and anticipated rates. 40 segments?






Needs to be supported separately from the target if possible .






Keep PMT's away from He leaks.






Need at least 5mm clearance between Start counter and CDC straws (CDC straw ID is Currently 8.25 inch (21 cm))






Light guides or fibers?






Using Blue scintillating plastic?






relative alignment between start counter and target?






Werner to write 1 page description for Doc DB on Start counter



Bcal 1.5.2.2.1 Lolos Define installation procedure (in or out of magnet) want to do it outside, everything apart the outer LG 12/1/2007




how to prevent eddie currents flowing due solenoid quench
12/1/2007




winston cone and LG design, how are they rapped; how are they glued to the LG's
12/1/2007




how to get the Bcal into the magnet
12/1/2007




Complete specification for fibers
11/30/2007




Light collection in outer layers, location of light detectors
12/31/2007




segmentation of outer bcal, planacons vs fine mesh pmts






Total length finalized 390 cm 11/2/2007




what does BCal TOF do for us, proton id, do we need the high resolution tdcs 62ps vs 120ps
1/15/2008




do we need CFDs or simple Discr.; layout of one channel
1/31/2008




sampling fraction increase by hybrid module design; pre-radiator yes or no
1/15/2008




what is the lower photon energy threshold using our new understanding on the light yield --> physics impact






SiPMT's heat load; peltiers yes or no for stabelizing temperature to 20^oC
1/30/2007




all the issues to be resolved with the SiPMTs






calibration system impact on technical design
12/31/2007




fabrication plan and QA plan
2/1/2008









Fcal 1.5.2.2.2 Zihlmann Find radiation hard blocks, how many tolerances.
1/30/2008




accessability to front FCAL for curing include into design






design for light collection and readout cylinder glued on pmt, connected to lead glas by silicon cookie 1/30/2008




timing with FADC, fitting procedures; proof of principle
3/30/2008




what timing resolution is needed
1/30/2008




inventory of cables, blocks and PMTs
12/31/2008




design for "cellular wall"; build a prototype to test temperatur and concept; decission for final design
3/30/2008




Calibration scheme studies by Athens, laser on the sheet in front of Fcal











UPV 1.5.2.2.3 Eugenio validation of current design
12/20/2007




Location and shape; conceptual design



















TOF 1.5.2.3.1 Zihlmann settle goals for timing resolution;
1/31/2008




shielding for individual PMTs. QA plan for quality of material






polishing, wraping, testing and quality plan






light guide vs no light guide






rate issues; inclusion of ToF in trigger track count; finer segmentation






electronic chain, which module
5/30/2008




holding structure
4/30/2008




calibration system following athens scheme with fibers











DAQ 1.5.3.1 Wolin Event size











Online 1.5.3.2 Wolin which software to use



Slow Controls
Wolin












Offline 1.5.3.3 Lawrence is capacitive coupling assumed for cdc reconstruction






impact of length of cdc on pattern recognition











FADC 1.5.4.1 Barbosa Finalize decisions on dynamic range and number of bits






specifications for sampling frequency and number of bits for 100 MHz flash.











TDC 1.5.4.2 Barbosa review least count requirement, esp. for TOF











Trigger 1.5.4.3 Doughty? clock distribution system definition











CFD/Splitter 1.5.4.5 Alberta? what do we need/want CFDs vs Disc. Integrate splitters for Bcal. All in VME



















Tagger 1.5.5.1.1 ? strategy for procurement (boundary between ped/construction)






Specification and SOW finalized



















Hodoscope 1.5.5.1.2 Jones/Klein do we want to do the design change proposed in June 07






prototype for microscope to measure light yield











Target 1.5.5.2 Seeley design for solid point target for commissioning






He from target danger for PMTs?






add 3 racks for target on cdc platform






can the H2 and D2 tanks be inside the hall --> safety?






how accurate do we need to know the target density; influence from magnet on density measurement; vaporpressure bulbs






how well has the target to be alligned in the magnet






cryogenic links between target and magnet; magnet in batch on continous filling mode ---> impact on target






do we need a 4cm diameter of the target






do we really want to use the 4K He from magnet to cool target






target will be operated subcool not a vapor pressure











Beamline 1.5.5.3 Jones collimators movable






pair spectrometer design currently 0%






Radiator defined











Assembly 1.5.6.1 Whitlatch BCAL assy technique
12/20/2007









Installation 1.5.6.2 Whitlatch BCAL insertion technique
12/20/2007









Cryogenics 1.5.6.3 Biallas Do the 3 coils at JLAB leak?
11/20/2007




How do we repair coil #3?



Calibration and alignment 1.5.2.1 Athens ? Tracking, Calorimetry, PID




1.5.2.2






1.5.2.3













RICH
all single or dual radiator, photon detector











DIRK
all do we want to leave space for a DIRK in the barrel