DDForward Muon

Installation and Commissioning

Dmitri DenisovFermilab

Director’s review 7/12/1999

PlanForward muon detectorsMini-drift tubes installationForward trigger detectors installationMuon shieldingCommissioning of forward muon detectors

DD Forward Muon Detector Upgrade

Forwardtrigger: scintcounters

Shielding

Forward tracker: mini-drift tubes

Completely new forward muon system for Run II

DD1 < || < 2A,B,C-layers

Forward Muon System

5,000 scintillation counters 50,000 mini-drift tube channels Each plane consists of 8 octants Total detectors weight is ~100ton with

coordinate accuracy of 1mm/10m

DD Mini-drift Tubes

Here will be individual mini-drift tube picture

DD Pixel Picture

Here will be individual pixel picture

DDForward Muon Trigger

System Assembly Status

All parts for all 48 octants are at Fermilab: counters, mounting brackets, etc.

43 out of 48 octant frames are made

Calibration system production is keeping pace with octants assembly

30 out of 48 octants assembled and tested and ready for installation:

all tubes, fibers, cables are tested calibration with r/a source and

LED calibration system is performed and documented

On schedule

DD Octant assembly

High quality picture of assembled octant will be here

DDForward Muon

Tracking Assembly Status

All 2300 mini-drift tubes for A layer are tested at Fermilab, all 2100 C layer tubes are at Fermilab, tests are under way

Production of B layer tubes continues at JINR: 50% completed

Assembly of A layer octants

Critical items for installation keep A layer octants assembly and

testing on schedule finish B/C layers drawings and procure

all materials

Tests of assembled octant in Lab F

DD Installation of Mini-drift Tubes

Octants are mounted individually on 3 supports, which are attached to magnet (A and B layers) or C layer trusses

Required accuracy of installation is 10mm, required accuracy of octant survey is 0.5mm

After octants are installed survey connection to gas system connection to slow control system connection to front-end electronics connection to high voltage system

Current status: design of octants mounts is finished, production started

DD MDT Mounts

Slide of C layer MDT mounts on C trusses

DDScintillation Trigger

Counters

Installation Each plane of counters consists

of 8 octants Octants are bolted together to

form planes (A and B layers) or “half” planes for C layer

Planes are installed on supports mounted on magnet (A and B layers) or C layer trusses (C layer)

Required installation accuracy is 10mm, required survey accuracy is 2mm

After installation survey connections to high voltage system connections to front-end

electronics

DD Pixels Installation

Drawing of pixels A layer plane installed will be here

DD Shielding and C Layer Trusses

While C layer trusses exist from Run I considerable modifications are required to support 100 ton shield

The shield 20” iron, 6” polyethylene, 2”

lead

Operating the shield Data-Taking Position Transport Position

Design is finished, production of parts is underway with assembly to follow

DD Data Taking Position

DD Transport Position

DD Shielding

C truss reinforcement going on at MAB C North truss pieces delivered

to Lab G for preass’y & survey C South truss ass’y underway

Stacking Lead + Poly into boxes at DAB

Poly & Boxes in High-bay.

EF Plug core

DD Time Schedule for Installation

Resource loaded schedule for forward muon detectors installation is developed

Assembly of C layer trusses and forward shielding starts in November 1999 and ends in February of year 2000

Installation of forward tracking detectors starts in April and ends in August 2000

Installation of forward trigger detectors starts in May and ends in September 2000

DD Installation Schedule

Here will be forward muon part of Bill’s schedule

DD Technician Manpower

“All” - refers to effort assigned to all tasks in the schedule

“Install.” - refers to effort assigned to a subset of installation tasks

Muon Fwd Tech EffortFNAL

0

5

10

15

20

25

Jan-

99

Mar

-99

May

-99

Jul-9

9

Sep

-99

Nov

-99

Jan-

00

Mar

-00

May

-00

Jul-0

0

Sep

-00

Nov

-00

Jan-

01

FT

Es

All

Install.

Actual

Plus Reqs

DD Commissioning of Mini-drift Tubes

Commissioning of each mini-drift tubes octant includes the following major tasks gas leaks test and operation of

gas flow monitors high voltage system check and

dark current measurement commissioning of front-end

electronics muon detection efficiency

measurement using cosmic rays Most of the tasks are similar to

tests of mini-drift tubes octants in Lab F

Commissioning will be done by joint efforts of physicists from JINR (6), Fermilab(1), NIU(1), PNPI(1), UW(1) and other D0 Collaboration groups

DD Cosmic Ray Tests at Lab F

Here will be event display picture of cosmic muon in Lab F per Mont’s request

DDCommissioning of Forward Trigger

Detectors Commissioning of each scintillation

counters octant will include test of high voltage system

operation light leak test response of counters to r/a source operation of calibration system commissioning of front-end

electronics determination of high voltage for

each group of counters and settings for electronics thresholds

Most of the tasks are similar to tests performed in Lab F during tests of assembled octants

The commissioning will be done by joint efforts of physicists from IHEP (5), NeU(1), Fermilab (1), NIU(1) and other D0 Collaboration groups

DDResults of Scintillation

Counters Commissioning in Lab F

Distribution of 96 counters response to r/a source

Stability of PMT gain over 6 months period for single octant

RMS is about 10%

Gain stability over 6 month is 3%

DD Manpower for Commissioning

Total number of detectors to be commissioned 50,000 channels of mini-drift

tubes and front-end electronics 5,000 scintillation counters and

same number of TDC/ADC electronics channels

The time for commissioning is short and determined by detector roll-in schedule

8-9 physicists will be required to perform each of the above tasks with help from electronics engineers and technicians

Most of these physicists are visitors from IHEP and JINR

DD Summary

We have good understanding of all installation aspects, but detailed engineering drawings and safety reviews have to be done: 1 additional engineer for ~ half a year

At some point techs participating in detector assembly come free, but to keep installation running in parallel with detectors production we need ~4 additional techs

Commissioning heavily relies on visitors from IHEP, JINR and PNPI, their presence and support

DD Mini-drift Tubes

Eight 1*1cm2 cross section cells mounted in a single gas volume

Tubes length is from 1m to 6m

Fast gas mixture of CF4(90%)+CH4(10%) provides maximum drift time of 60ns

Coordinate accuracy is ~0.5mm

High detection efficiency Tubes are produced at JINR

(Dubna) and delivered to Fermilab where they are assembled into octants

DDTrigger

Scintillation Counters

Bicron 404A scintillator with Kumarin WLS bars along two edges

1” diameter fast PMT with resistive base

About 45 different sizes from 15cm up to 1.2m

Minimum number of photoelectrons is 60 for largest counter

Time resolution is 1ns Counters are produced at

IHEP (Protvino) and delivered to Fermilab for assembly into octants

DD MDT Mounts

Here will be slide of MDT A layer installation scheme

DD Data Taking Position

DD Transport Position

DD Open Position

DD Open Position

DD Assembly Plan

Shielding boxes ass’y Assemble & install North + South

EF plugs Assemble/Test North/South C

bottom truss and shield Assemble/Test North/South C top

truss Installation of North+South C

truss components Installation of mini-drift tubes and

scintillation counters Assembly trusses and shield on

the sidewalk Move trusses into collision hall

DD Test Results of Mini-drift Tubes in Lab F

Summary of test results of 2300 mini-drift tubes in Lab F Total measured 2302 (100%) Rejected during tests 64

(2.8%)

Out of 64 rejected tubes the statistics is the following Gas leaks 47 (73%) Broken damping resistors 9

(14%) Wire tension 7 (11%) High dark current 1 (2%)

We expect low detector failure rate during commissioning