MuCool Test Facility Instrumentation Update

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MuCool Test FacilityInstrumentation Update

• M. Haney, D. Errede,Z. Conway
• University of Illinois at Urbana-Champaign
• 12/13 August 2002

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Instrumentation

• Seeking an intrinsically safe solution for
  instrumenting the LH2 absorber in the MTF
• Prudent to accommodate MICEand European safety
  considerations
• i.e. do it right the first time

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Objective - Safety

• Intrinsic safety, if possible
• Limited power per channel
• Good idea for Fermi required for Europe
• Gas-purged enclosure, if necessary
• 19 rack, 40U tall

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Instrumentation (1)

• Lakeshore 218S
• 8 channel cryo temperature monitor
• /- 21m K at 10 K
• 16 readings/s
• GPIB interface (to PC)
• TG-120PL GaAlAs diodes (8)
• -180mV/K at 4.2 K
• B lt 5 T rad hard

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Instrumentation (2)

• FISO Fiber-optic strain and temperature
• BUS chassis, with 4 (up to 8) modules
• 1000 readings/s
• RS-232 interface (to PC)
• FOS-N strain sensors
• /- 500 me 0.01 full scale 0.2mm O.D.
• FOT-L temp sensors
• 0.1 K resolution 1.5mm x 32mm (10mm active)
• Slow 1.5 second response

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Instrumentation (3)

• Gateway E-4000 PC
• 1.8 GHz, 1Gbyte RAM, 0.5Gbyte cache
• 120Gbyte disk, Windows 2000
• 15 LCD flat panel display
• 640x480 CCD camera, microphone
• PCI-MIO-16E-1
• 16 channel ADC, 1.25 Msample/s, 12 bits, /-10 V
• Tripplite Smart UPS
• 3000 VA

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Instrumentation (4)

• IRM
• 64 channel multiplexed ADC
• 16 bit, 100 Ksamples/s
• ACNET network connection
• All PC data will be posted to IRM for ACNET access

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Instrumentation (5)

• MTL7055ac barriers
• Low level AC
• 24 W per line
• 3 V max
• MTL7060ac barriers
• Star-connected AC
• 101 W per line
• 8.5 V max

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(basic) Barrier
fuse
Power Signal
safe circuit
Return
Ground
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Signals inside (the cryostat)

• 8 (cryo) temperatures
• readout via GPIB LabView (PC)
• Multiple fibers
• FISO strain, temperature (4)
• Pressure, flow?
• Laser occlusion (2)
• Simple spark detectors (2)
• (light pipe to photodiode)
• 25(ish) 4-wire bolometry strips

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(more) Signals inside

• Piezo vibration sensor
• via (16 chan/12 bit) ADC and LabView (PC)
• Local (64 chan/16 bit) IRM channels
• via LabView (see last slide)
• MICE channels (?)
• placeholder for the future

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Signals outside

• USB (4 wires, and shield) for CCD camera and
  microphone
• via PC
• Many voltages, currents, temperatures, pressures
• magnets, beam position monitors, etc.
• Most available from ACNET or local IRM
• via LabView (see last slide)
• or Cyro-PLC

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Two Possibilities (1)

• Intrinsically safe

Hazard Safe
Sealed Conduit(s)
Barrier(s)
ACNET
IRM
Cryo(temp)
FISO
PC w/16 chan ADC
network
power
Intrinsically safe signal conditioners and
transmitters
UPS
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Two Possibilities (2)

• Gas-purged box

Hazard Safe
Barrier(s)
Sealed Conduit(s)
ACNET
IRM
Cryo(temp)
FISO
PC w/16 chan ADC
network
power
UPS
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This Summer Z. Conway

• LabView interface
• GPIB to cryo temp monitor - works
• PC-internal ADC (e.g. for piezo) works
• Simple ADC data read - works
• High rate collection and compression not yet
• IRM communications
• IRM-ADC Read - works
• Write any moment now
• Integration remains!

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Open Issues

• WireShielding Concerns
• Noise/sensitivity issues due to wirebarrier
  resistance?
• Approx 12 W /ft for 36 AWG manganin wire
• 48 W to 202 W added by barrier
• And diode capacitance
• Common mode (surges) due to magnets?
• Need to protect electronics without burning
  barriers
• Cable plant into solenoid

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Open Issues (2)

• Software Concerns
• Posting data to the IRM
• For ACNET access
• Reading data from ACNET
• For PC access
• Remote control of PC
• Citrix ICA, PCAnyWhere, etc.
• LabView web-remote instrumentation
• KVM?

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Open Issues (3)

• FISO strain and temp sensors
• Not official rated below -40 C (!)
• Temp has been used at 35 K (custom)
• No experience with strain gages
• Company very willing to work with us
• To adjust signal conditioner, correction curves,
  etc.
• Will require some form of agreement
• Confidentiality, exclusivity for the instrument
• Yet freedom to use and publish measurements
• Also pressure, flow?