1. MuCool Test Facility Instrumentation Update
M. Haney, D. Errede, Z. Conway
University of Illinois at Urbana-Champaign
12/13 August 2002

2. Instrumentation
Seeking an intrinsically safe solution for instrumenting the LH2 absorber in the MTF
Prudent to accommodate MICE and European safety considerations
i.e. do it right the first time…
12/13 August 2002
m. haney, et al.

3. 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
12/13 August 2002
m. haney, et al.

4. Instrumentation (1) Lakeshore 218S TG-120PL GaAlAs diodes (8)
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 < 5 T; rad hard
12/13 August 2002
m. haney, et al.

5. 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…
12/13 August 2002
m. haney, et al.

6. Instrumentation (3) Gateway E-4000 PC PCI-MIO-16E-1
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
12/13 August 2002
m. haney, et al.

7. 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
12/13 August 2002
m. haney, et al.

8. Instrumentation (5) MTL7055ac barriers MTL7060ac barriers Low level AC
24 W per line
3 V max
MTL7060ac barriers
Star-connected AC
101 W per line
8.5 V max
12/13 August 2002
m. haney, et al.

9. (basic) Barrier fuse Power + Signal “safe circuit” Return Ground
12/13 August 2002
m. haney, et al.

10. 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
12/13 August 2002
m. haney, et al.

11. (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…
12/13 August 2002
m. haney, et al.

12. 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
12/13 August 2002
m. haney, et al.

13. 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
12/13 August 2002
m. haney, et al.

14. 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
12/13 August 2002
m. haney, et al.

15. This Summer – Z. Conway LabView interface Integration – remains!
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!
12/13 August 2002
m. haney, et al.

16. Open Issues Wire+Shielding Concerns
Noise/sensitivity issues due to wire+barrier 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
12/13 August 2002
m. haney, et al.

17. 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?
12/13 August 2002
m. haney, et al.

18. 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?
12/13 August 2002
m. haney, et al.