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     ![](media/image1.pct){width="0.44166666666666665in"                    
     height="0.41597222222222224in"} **Fermilab Directorate**               

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**ADDENDUM TO THE**

**MEMORANDUM OF UNDERSTANDING**

**T945-A1**

**COUPP Muon Veto Detector**

**Calibration and Installation**

December, 2005

INTRODUCTION 3

I. PERSONNEL AND INSTITUTIONS: 5

II\. EXPERIMENTAL AREA, BEAMS AND SCHEDULE CONSIDERATIONS 5

III\. RESPONSIBILITIES BY INSTITUTION - NON FERMILAB 6

IV\. RESPONSIBILITIES BY INSTITUTION - FERMILAB 6

4.1 Fermilab Accelerator Division 6

4.2 Fermilab Particle Physics Division 6

4.3 Fermilab Computing Physics Division 7

4.4 Fermilab ES&H Section 7

V. Summary of Costs 7

VI\. SPECIAL CONSIDERATIONS 8

SIGNATURES 9

appendix i - Appendix II - prep equipment pool needs 10

APPENDIX II - Hazard Identification Checklist 11

INTRODUCTION

This Addendum to the T945 Memorandum of Understanding describes a
scintillating muon veto detector system that will be added to the COUPP
bubble chamber in the MINOS near hall and use of beam time at Fermilab
during the Winter 2005- 2006 Meson Test Run to plateau these muon veto
counters.

This is a memorandum of understanding between FNAL and the experimenters
in COUPP. This memorandum is intended solely for the purpose of
providing a work allocation for FNAL and the experimenters. It reflects
an arrangement that is currently satisfactory to the parties involved.
It is recognized, however, that changing circumstances of the evolving
research program may necessitate revisions. The parties agree to
negotiate amendments to this memorandum to reflect such revisions.

COUPP is a detector test of a bubble chamber that is sensitive only to
nuclear recoils, thus making an ideal dark matter detector. It operates
under the T945 test beam designation and is currently running in the
MINOS near hall onsite at Fermilab. The experimenters believe that the
ultimate limitation for rate in this bubble chamber is due to neutrons
generated from cosmic ray interactions. Other dark matter experiments
have found that it is necessary to veto the cosmic ray muon flux that
remains after filtering through the rock overburden. The COUPP detector
would like to implement such a muon veto shield in its current
configuration.

The experimenters have found an adequate supply of scintillators in the
KTEV experiment onsite at Fermilab. The experimenters will use about 150
of the hodoscopes that were used as the muon system in KTEV. These
scintillators are 15 cm x 150 cm. Figure 1 shows how these scintillators
would form a cage around the COUPP bubble chamber. There are two layers
in each side, to form coincidences, and the two layers are separated by
high density polyethylene to absorb the gammas prevalent in the MINOS
hall. The PMT's will be powered by a LRS 1440 high voltage system (which
requires a 208V outlet in the MINOS hall) and will be read out by a
combination of CAMAC and NIM electronics, outlined in Appendix I.

![](media/image2.png){width="3.027083333333333in"
height="2.6305555555555555in"}

Figure 1. View of muon veto cage around COUPP bubble chamber.

To ensure that these hodoscopes are efficient for muon vetoing and also
to ensure that their accidental veto rate is small enough not to affect
the experiment's live time, it is crucial to set the high voltage on the
PMT's for these counters just above their plateau point. The
experimenters thus plan on beam time in the Meson Test Beam line to
determine this plateau point for all counters. The experimenters will
align 9 counters at a time in the downstream MT6 beam enclosure. Each
slow spill will give enough rate to make one voltage measurement for
these 9 counters. About 20 measurements need to be made (30 volt steps
from 1500 to 2100 V). Each spill takes 2 minutes, thus 9 counters can be
plateaued in 40 minutes, or the whole set of 150 in about 24 hours
(taking into account accesses to change over counters). Depending on
beam conditions, the experimenters can run simultaneously with other
test beam groups.

The experimenters are building the L-shaped side support structures and
top lattice structure in lab 8. The experimetners will verify that the
counters will fit and then will lower them into the MINOS hall down the
access shaft. Any counters not attached to the support structures will
be brought down in the elevator and assembled onto the support structure
at the COUPP site.

> **I. PERSONNEL AND INSTITUTIONS:**

Spokesman and

physicist in charge of beam tests: Erik Ramberg

The group members at present are all Fermilab employees:

Mike Crisler, Andrew Sonnenschein, Hogan Nguyen, Todd Nebel

> **II. EXPERIMENTAL AREA, BEAMS AND SCHEDULE CONSIDERATIONS**

1.  LOCATION

> 2.1.1 The muon veto system frame will be built and initially tested at
> lab 8 and then lowered into the MINOS near hall, at which time any
> scintillators that haven't been put on will be attached.

1.  The plateauing of the muon counters is to take place in the MTest
    beam line and located in the area designated MT6-B4. In addition,
    the main control room to the west of the MTest line will be used to
    house electronics (one NIM bin, one CAMAC, our computer, and scope),
    and provide a small amount of work space (for 2 people).

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2.  BEAM

    1.  The plateauing tests will use slow resonantly-extracted, Main
        Injector proton beam focused onto the MTest target. The tests
        require a beam of untagged, charged particles of any momentum
        above 16 GeV.

    ```{=html}
    <!-- -->
    ```
    2.  Intensity: In the range of 5 KHz in an area of a square cm or
        so.

3.  SETUP\
    The setup in the MTest beamline will be a unistrut table on a die
    cart. Wooden holders will hold the hodoscopes to be tested. (The
    wood will be painted with non-flammable paint.) The experimenters
    will connect the HV cables for the counters from the beamline to the
    main control room, where the experimtners will control the HV
    settings. The signal cables will also come into the main control
    room so that the experimenters can measure rates.

4.  SCHEDULE\
    Since the experimenters have already used the table and holders in
    measurements downstream of the MT6 beamstop, everything is
    essentially ready to go. The experimenters can move into the
    beamline at any time and immediately begin taking data. The
    experimenters will probably take data 8 hours per day for about 3
    days, with two people manning each shift. The experimenters will be
    able to take data simultaneously with other groups.

# 

# **III. RESPONSIBILITIES BY INSTITUTION - NON FERMILAB**

1.  There are no non-Fermilab members in this group.

> **IV. RESPONSIBILITIES BY INSTITUTION - FERMILAB**

## 4.1 Fermilab Accelerator Division:

> 4.1.1 Use of MTest beam.
>
> 4.1.2 Maintainence of all existing standard beam line elements (SWICs,
> loss monitors, etc) instrumentation, controls, clock distribution, and
> power supplies.

3.  Reasonable access to the experimenters' equipment in the test beam.

4.1.4 The test beam energy and beam line elements will be under the
control of the BD Operations Department Main Control Room (MCR).

5.  Position and focus of the beam on the experimental devices under
    test will be under control of MCR. Control of secondary devices that
    provide these functions may be delegated to the experimenters as
    long as it does not violate the Shielding Assessment or provide
    potential for significant equipment damage.

6.  The integrated effect of running this and other SY120 beams will not
    reduce the antiproton stacking rate or protons on target for the
    neutrino program by more than 5% globally, with the details of
    scheduling to be worked out between the experimenters and the Office
    of Program Planning.

> 4.1.S Summary of Beam Division costs:
>
> Type of Funds Equipment Operating Personnel
>
> (person-weeks)
>
> Total new items \$0.0K \$0K 0.0

## Fermilab Particle Physics Division

## All material purchases will be paid for with T945 funds already allocated. 

##  

1.  The test-beam efforts in this MOU will make use of the Meson Test
    Beam Facility. Requirements for the beam and user facilities are
    given in Section 2. The Fermilab Particle Physics Division will be
    responsible for coordinating overall activities in the MTest
    beam-line, including use of the user beam-line controls, readout of
    the beam-line detectors, and MTest gateway computer. (2 person
    weeks)

2.  Assistance in moving KTEV muon counters to Meson Test Beam area. (1
    person week)

3.  Assistance in constructing muon veto support structure. (1
    person-month) \[\$10K\]

4.  Assistance in lowering muon veto support system into the MINOS near
    hall. The experimenters will generate a work hazard analysis (WHA)
    for this task.

5.  Installation of 208V circuit in MINOS hall. \[\$1.5K\]

6.  The experimenters require one NIM bin and two CAMAC crates for the
    project, as well as various PREP modules. The list of electronic
    modules needed is given in Appendix 1.

4.2.S Summary of Particle Physics Division costs:

> Type of Funds Equipment Operating Personnel
>
> (person-weeks)
>
> Total new items \$11.5K \$0K 7
>
> 4.3 Fermilab Computing Division
>
> 4.3.1 No support from the computing division is needed for the muon
> veto addition.
>
> 4.4 Fermilab ES&H Section
>
> 4.4.1 The experimenters will require assistance with safety reviews.

# 

# **V. Summary of Costs**

> **Source of Funds \[\$K\] Equipment Operating Personnel**
>
> (person-weeks)
>
> Accelerator Division \$0K \$0K 0
>
> Particle Physics Division \$11.5K 0 7
>
> Computing Division 0 0 0
>
> Totals Fermilab \$11.5K 0 7

# **VI. SPECIAL CONSIDERATIONS**

> 6.1 The responsibilities of the spokesman of the COUPP veto group and
> the procedures to be followed by experimenters are found in the
> Fermilab publication \"Procedures for Experimenters\"
> (<http://www.fnal.gov/directorate/documents/index.html>).. The
> Physicist in charge agrees to those responsibilities and to follow the
> described procedures.
>
> 6.2 To carry out the experiment a number of Environmental, Safety and
> Health (ES&H) reviews are necessary. This includes creating a Partial
> Operational Readiness Clearance document in conjunction with the
> standing Particle Physics Division committee. The spokesman of the
> COUPP veto group will follow those procedures in a timely manner, as
> well as any other requirements put forth by the division's safety
> officer.
>
> 6.3 The spokesman of the COUPP veto group will ensure that at least
> one person is present at the Meson Test Beam Facility whenever beam is
> delivered and that this person is knowledgeable about the experiment's
> hazards.
>
> 6.4 All regulations concerning radioactive sources will be followed.
> No radioactive sources will be carried onto the site or moved without
> the approval of the Fermilab ES&H section.

6.5 All items in the Fermilab Policy on Computing will be followed by
the experimenters.

(<http://computing.fnal.gov/cd/policy/cpolicy.pdf>).

> 6.6 The spokesman of the COUPP veto group will undertake to ensure
> that no PREP or computing equipment be transferred from the experiment
> to another use except with the approval of and through the mechanism
> provided by the Computing Division management. The spokesman will also
> undertake to ensure that no modifications of PREP equipment take place
> without the knowledge and consent of the Computing Division
> management.
>
> 6.7 The COUPP veto group will be responsible for maintaining and
> repairing both the electronics and the computing hardware supplied by
> them for the experiment. Any items for which the experiment requests
> that Fermilab performs maintenance and repair should appear explicitly
> in this agreement.
>
> 6.8 At the completion of the experiment:
>
> 6.8.1 The spokesman of the COUPP veto group is responsible for the
> return of all PREP equipment, computing equipment and non-PREP data
> acquisition electronics. If the return is not completed after a period
> of one year after the end of running the spokesman of the Iowa group
> will be required to furnish, in writing, an explanation for any
> non-return.
>
> 6.8.2 The experimenters agree to remove their experimental equipment
> as the Laboratory requests them to. They agree to remove it
> expeditiously and in compliance with all ES&H requirements, including
> those related to transportation. All the expenses and personnel for
> the removal will be borne by the experimenters.
>
> 6.8.3 The experimenters will assist the Fermilab Divisions and
> Sections with the disposition of any articles left in the offices they
> occupied, including computer printout and magnetic tapes.
>
> 6.8.4 An experimenter will be available to report on the test beam
> effort at a Fermilab All Experimenters Meeting.
>
> **SIGNATURES:**
>
> \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ / /
> 2006
>
> Erik Ramberg, Fermilab
>
> \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
> / / 2006
>
> Greg Bock, Particle Physics Division
>
> \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
> / / 2006
>
> Roger Dixon, Accelerator Division
>
> \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
> / / 2006
>
> Robert Tschirhart, Computing Division
>
> \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
> / / 2006
>
> William Griffing, ES&H Section
>
> \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
> / /2006
>
> Hugh Montgomery, Associate Director, Fermilab
>
> \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
> / /2006
>
> Steven Holmes, Associate Director, Fermilab

#  **Appendix I --** COUPP Muon Veto **-- Equipment pool needs**

> PREP Equipment Pool needed for Fermilab test beam on the first day of
> setup. Items with an asterisk (\*) indicate equipment in hand.

[Quantity]{.underline} [Description]{.underline}

1 NIM crate, with cooling fans \*

2 CAMAC crate and power supply

12 LRS 4413 discriminators \*

2 Phillips 710 discriminators \*

2 Phillips 752 coincidence units \*

2 LRS 429 logic fan in/fan outs \*

1 LRS 222 gate generator \*

1 LRS 1449 main frame \*

1 LRS 1441/1442/1445 HV controllers/supplies \*

1 LRS 1447 handheld TTY

1 LRS 2132 CAMAC interface

10 LRS1443 HV cards

> **APPENDIX II - Hazard Identification Checklist**

Items for which there is anticipated need have been checked

<table style="width:100%;">
<colgroup>
<col style="width: 4%" />
<col style="width: 5%" />
<col style="width: 2%" />
<col style="width: 20%" />
<col style="width: 4%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 17%" />
<col style="width: 5%" />
<col style="width: 28%" />
</colgroup>
<tbody>
<tr class="odd">
<td colspan="4"><strong>Cryogenics</strong></td>
<td colspan="4"><strong>Electrical Equipment</strong></td>
<td colspan="2"><p><strong>Hazardous/Toxic</strong></p>
<p><strong>Materials</strong></p></td>
</tr>
<tr class="even">
<td></td>
<td colspan="3">Beam line magnets</td>
<td></td>
<td colspan="3">Cryo/Electrical devices</td>
<td></td>
<td>List hazardous/toxic materials</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="3">Analysis magnets</td>
<td></td>
<td colspan="3">Capacitor banks</td>
<td></td>
<td>planned for use in a beam line or experimental enclosure:</td>
</tr>
<tr class="even">
<td></td>
<td colspan="3">Target</td>
<td><strong>X</strong></td>
<td colspan="3">high voltage (150 channels supplied by LRS 1440
system</td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="3">Bubble chamber</td>
<td></td>
<td colspan="3">exposed equipment over 50 V</td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="4"><strong>Pressure Vessels</strong></td>
<td colspan="4"><strong>Flammable Gases or Liquids</strong></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="3"></td>
<td>inside diameter</td>
<td colspan="2">Type:</td>
<td colspan="2"></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="3"></td>
<td>operating pressure</td>
<td colspan="2">Flow rate:</td>
<td colspan="2"></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="3"></td>
<td>window material</td>
<td colspan="2">Capacity:</td>
<td colspan="2"></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="3"></td>
<td>window thickness</td>
<td colspan="4"><strong>Radioactive Sources</strong></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="4"><strong>Vacuum Vessels</strong></td>
<td></td>
<td colspan="3">permanent installation</td>
<td colspan="2"><strong>Target Materials</strong></td>
</tr>
<tr class="even">
<td colspan="3"></td>
<td>inside diameter</td>
<td></td>
<td colspan="3">temporary use</td>
<td></td>
<td>Beryllium (Be)</td>
</tr>
<tr class="odd">
<td colspan="3"></td>
<td>operating pressure</td>
<td colspan="3">Type:</td>
<td></td>
<td></td>
<td>Lithium (Li)</td>
</tr>
<tr class="even">
<td colspan="3"></td>
<td>window material</td>
<td colspan="3">Strength:</td>
<td></td>
<td></td>
<td>Mercury (Hg)</td>
</tr>
<tr class="odd">
<td colspan="3"></td>
<td>window thickness</td>
<td colspan="4"><strong>Hazardous Chemicals</strong></td>
<td></td>
<td>Lead (Pb)</td>
</tr>
<tr class="even">
<td colspan="4"><strong>Lasers</strong></td>
<td></td>
<td colspan="3">Cyanide plating materials</td>
<td></td>
<td>Tungsten (W)</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="3">Permanent installation</td>
<td></td>
<td colspan="3">Scintillation Oil</td>
<td></td>
<td>Uranium (U)</td>
</tr>
<tr class="even">
<td></td>
<td colspan="3">Temporary installation</td>
<td></td>
<td colspan="3">PCBs</td>
<td></td>
<td>Other : <strong>Iron (Fe), Ta Cu</strong></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="3">Calibration</td>
<td></td>
<td colspan="3">Methane</td>
<td colspan="2"><strong>Mechanical Structures</strong></td>
</tr>
<tr class="even">
<td></td>
<td colspan="3">Alignment</td>
<td></td>
<td colspan="3">TMAE</td>
<td></td>
<td>Lifting devices</td>
</tr>
<tr class="odd">
<td colspan="2">type:</td>
<td colspan="2"></td>
<td></td>
<td colspan="3">TEA</td>
<td></td>
<td>Motion controllers</td>
</tr>
<tr class="even">
<td colspan="2">Wattage:</td>
<td colspan="2"></td>
<td></td>
<td colspan="3">photographic developers</td>
<td>X</td>
<td>scaffolding/elevated platforms</td>
</tr>
<tr class="odd">
<td colspan="2">class:</td>
<td colspan="2"></td>
<td></td>
<td colspan="3">Other: Activated Water?</td>
<td></td>
<td>Others</td>
</tr>
</tbody>
</table>