E907 Installation Conference Call Minutes

25 March 2003

Location

Phone Number

Access Code

WH-2 NE

865-673-6703

334823

Contents

Progress Updates and Issues
  1. Upstream Beamline
    1. BEAM - Beamline
    2. UBL - Upstream Beamline Detectors
  2. Targets
    1. TGTW - Target Wheel
    2. CTGT - Cryo Targets
    3. NTGT - NuMI (MINOS) Target
  3. TPC - Time Projection Chamber
  4. Magnets
    1. ZipTrack
    2. JGG - Jolly Green Giant
    3. Rosy
  5. CKOV - Cerenkov
  6. DC - Chambers
    1. DC1-4 (E690 Chambers)
    2. DC5 & DC6 (Iowa Chambers)
  7. TOF - Time of Flight
  8. RICH - Ring Imaging Cerenkov
  9. ECAL - EM Calorimeter
  10. NCAL - Hadron Calorimeter
  11. Gas Systems
  12. DAQ - Data Acquisition
  13. MC - Monte Carlo
  14. Installation
    1. Alignment
  15. MC7 - Enclosure and Counting House
  16. Meetings
  17. Project Management

Next Call

Progress Updates and Issues

Leon Beverly's meeting summaries in italics.

Upstream Beamline

BEAM - Beamline

Raja:

Using the new beam line design and the calculated particle acceptances, I have updated the tables in our proposal related to particle fluxes and interaction rates. I have also calculated the total number of protons needed by the experiment, primarily for shielding calculations. The spreadsheet used for the calculations (original supplied by Ed Hartouni) as well as the pdf and MSword files of the resulting tables can be found at

http://ppd.fnal.gov/experiments/e907/Beam/Beam.html

Identified 3Q & 4Q quads to use in the beamline; plan to move them to MTF.

UBL - Upstream Beamline Detectors

BCKOV

The CKOV that had remote control has been prepped and taken to MC7 where it awaits installation. Installation of components to make the 2nd CKOV remotely controllable is in progress at MAB. The installation is 80% complete, waiting for back-ordered bolts, small drilling and welds.

Requisition for purchase of 2 PMTs have been faxed to LLNL.

Pipe flanges worth $2600 needed. A purchase requisition has been faxed to LLNL.

APACS requisition for stage 1 items is in the system.

Targets

TGTW - Target Wheel

CTGT - Cryogenic Targets

NTGT - NuMI (MINOS) Target

TPC - Time Projection Chamber

Jim Kilmer:

I think I'll try to use a stainless bolt and either a brass or aluminum bushing to do the cam follower thing [on the TPC cart]. These things will be non-magnetic and will work fine since we'll not be moving the TPC cart very fast.

Magnets

T&M electrical work in progress on power supplies in MS5. The plan to have the PSs operational on April 7th.

ZipTrack

JGG - Jolly Green Giant

Rosie

CKOV - Cerenkov

DC - Drift Chambers

DC1-4 (E690 Chambers)

Pierrick:

As promised, I am giving you what I believe are reasonable dates for installation and integration of the DCs into the E907 hall and DAQ.

Now that the major problems are fixed with the testing of the electronics, we should complete the testing of the testand electronics by mid next week. This means that we can begin to use the cosmic ray testand to check out the chamber itself. This part is ready to go. The tests that we will perform on this first chamber, DC4, will include tests for determination of gas mixtures; so this will take time as we need to purge the chamber everytime that we change the mixture. For each gas mixture (I believe that we'll try 3 mixtures), we will run HV vs eff curves for different discriminator thresholds. I estimate <10 days per gas mixture. This will also complete the tests that we want to perform on this chamber.

Next, DC1 is ready to go into the testand. However, it will require much less time to test, O(2 weeks). By the time we've completed the tests on DC1, DC2 and possibly DC3 will be ready to go.

Integration work will be done in parallel, and will commence once the electronics testing has begun in earnest and DC4 testing is complete.

In summary:

DC4

Installed by end of April

DC1

mid May

DC2

end of May

DC3

mid June

I think that this schedule will provide ample pressure and still give us some time for unforseen problems. After DC1 is complete, the testing of DC2 and DC3 may advance by as much as 1 week for each chamber.

I do not have enough information about the gas system to comment on its readiness.

Test stand fully operational.

About 50% of all discriminator cards tested have failed the test. (These had been stored outside.) Only 5 of 240 preamps have been bad. Pierrick plans to run a couple shifts once chamber testing is in full swing.

Checked for crate power supply problem, looks ok. Instead, backplane threshold sagging with all discriminator cards installed. Currently testing with half the cards.

Bringing discriminator towers back from IIT, cleaned but no tested.

Ken Nelson agrees, based on the source test results, that the cathode planes are OK and don't need to be rewound.

Started cleaning DC2, found lots of tears to kapton flex strips, including ~20 broken wires.

Gas order now with Leon.

DC5 & DC6 (Iowa Chambers)

Support stands need to be painted, taken to PC4 and test mount chambers.

TOF - Time of Flight

Ed Hartouni:

Here are some thoughts I've written up on track fitting, momentum resolution, and the TOF multiple scattering.

First finding is that, with the resolution of the E690 and the Iowa chambers,the momentum resolution of the "Rosie spectrometer" is dpz/pz = 0.0034 pz [GeV/c]. Note that his gives 34% resolution at 100 GeV/c.

The conclusion: if this momentum resolution is tolerable, the 5 cm thick scintillator is not a big effect.

However, if a high resolution chamber (for example, 50 microns) is added at the chamber 6 location, the momentum resolution at 100 GeV/c is lowered to rougly 2.5% with no TOF. Adding the 5cm thick TOF then dominates the slope determination. A hole of roughly +- 15 cm, +-11 cm (x,y) in the scintillator would allow 50 GeV/c particles with as much as +-1 GeV/c of transverse momentum to pass unscattered.

Raja will send an email confirming the decision to use 5cm material covering the area over Rosieâs aperture and 10cm material over the outer area of the TOF. USC is getting a quote for the Winston cones. Request to Leon to ship unistrut parts to prototype module.

RICH - Ring Imaging Cerenkov

Andre coming the week of the 31st to test boards. Terry investigating O2 sensors.

ECAL - EM Calorimeter

Construction of 7 planes is complete, will finish by the 28th.

NCAL - Calorimeter

Lunchun Lu:

Since you were asking about the electronic for the hadron calorimeter last Tuesday meeting, I think I should send you the drawing [below]. You can also find the drawing on our MIPP web page.

NCAL electronics diagram

This drawing was sent to Winslow Baker and has been gone through Stan Orr who is designated to assist us in the electrical safety issues. Should I assemble all the modules in the drawing by myself or someone else in the collaboration is taking care of all the electronic modules for the experiment? All the modules can be found from Fermilab PREP.

The NCAL has eight PMT channels, not six.

It just came to my mind that I may need to add a Gate Generator (Lecroy 4222) which will give two outputs to two ADC modules. In one of the Tuesday meeting, we were asking a question about delay from triggers but we didn't have a clear answer yet. So we may need a Gate Generator for the delay genetating. Please add the Lecroy 4222 Gate Generator to PREP list as well.

Light guides being machined in Lab 6, shoulld be done end of next week. Design of light box will done by the 28th; Craig would like to cut lower beams from the undercarriage to allow for better work access under the calorimeter. Jim K. will investigate. Readout scheme has been revised to use standard modules. Monte Carlo needs geometry input.

Gas Systems

Gas shed discussion based on fire committee walkthrough:

DAQ - Data Acquisition

MC - Monte Carlo

Installation

Alignment

MC7 Enclosure and Counting House

Meetings

Project Management

Next Systems Call

The next call will be Tuesday, 1 April 2003, at 1:00 PM CDT in WH-2NE, Snake Pit.

PDB, 4/11/03