1. Linac Test Area Instrumentation Update M. Haney, D. Errede, Z. Conway University of Illinois at Urbana-Champaign 14 June 2002

2. m. haney, et al.2 Instrumentation Need safe solution for instrumenting the LH 2 absorber in the LTA Prudent to accommodate MICE and European safety considerations –i.e. do it right the first time…

3. 14 June 2002m. haney, et al.3 Primary Objective - Safety Intrinsic safety, if possible –Less than 1 watt (per channel?) –Good idea for Fermi; required for Europe Gas-purged enclosure, if necessary –19” rack, 40U tall

4. 14 June 2002m. haney, et al.4 Signals inside (the cryostat) 12 (cryo) temperatures –readout via GPIB + LabView (PC) 25(ish) 4-wire bolometry strips Multiple fibers –FISO strain gages –Laser occlusion? –Simple spark detectors (light pipe to photodiode)

5. 14 June 2002m. haney, et al.5 (more) Signals inside USB (4 wires, and shield) for CCD camera –via PC 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…

6. 14 June 2002m. haney, et al.6 Signals outside 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 –and Intellution

7. 14 June 2002m. haney, et al.7 Two Possibilities (1) Intrinsically safe UPS PC w/32 chan ADC FISO Cryo(temp) IRM Barrier(s) network ACNET Sealed Conduit(s) Intrinsically safe signal conditioners and transmitters power Hazard Safe

8. 14 June 2002m. haney, et al.8 Two Possibilities (2) Gas-purged box UPS PC w/32 chan ADC FISO Cryo(temp) IRM Barrier(s) network ACNET Sealed Conduit(s) power Hazard Safe

9. 14 June 2002m. haney, et al.9 (basic) Barrier Power + Signal Return Ground “safe circuit” fuse

10. 14 June 2002m. haney, et al.10 This Summer – Z. Conway LabView interface –GPIB –ADC –IRM

11. 14 June 2002m. haney, et al.11 Open Issues Local signal condition vs Purged box –Common mode concerns (noise from magnets) Especially surge currents on start/stop –Long wires! 2-wire vs 4-wire solutions –Shielding and noise sensitivity in general –Cable plant size concern (already 200+ wires, not including shielding)

12. 14 June 2002m. haney, et al.12 Open Issues (2) LabView vs C –to read ACNET data (mostly, IRMs outside of the experiment) Remote control of PC –Citrix ICA, PCAnyWhere, etc. –LabView web-remote instrumentation –KVM?