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HiRes-1 Operations

HiRes-1 Operations. Presented by: C. Jui HiRes Review NSF, Nov. 22, 2002. HiRes-1 Operations. HiRes-1 operated continuous since 1997 on nights with > 3 hours of darkness EXCEPT : August 1999: U. of Utah hosted the 26th International Cosmic Ray Conference (ICRC)

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HiRes-1 Operations

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  1. HiRes-1 Operations Presented by: C. Jui HiRes Review NSF, Nov. 22, 2002

  2. HiRes-1 Operations • HiRes-1 operated continuous since 1997 on nights with > 3 hours of darkness EXCEPT: • August 1999: U. of Utah hosted the 26th International Cosmic Ray Conference (ICRC) • Pentagon Security Review (5/2000-7/2000) • Sensitive tests (6/2001, and 8/2001) +… • Security Alert status (10/2001- 4/2002)

  3. HiRes-1Operations 1997 moonless night time:  884 monocular observation:  436 El-Nino: Dugway Precip > 200% of normal

  4. HiRes-1Operations 1998 moonless night time:  1428 monocular observation:  738 El Nino: Dugway Precip > 200% of normal

  5. ICRC 1999 in Salt Lake City HiRes-1Operations 1999 moonless night time:  1369 monocular observation:  820

  6. Shutdown for Pentagon Review HiRes-1Operations 2000 moonless night time:  1489 monocular observation:  866

  7. Post 9/11 Sensitive Tests at Dugway HiRes-1Operations 2001 moonless night time:  1400 monocular observation:  461

  8. HiRes-1Operations Restart with LANL operators 2002 (as of 11/17/02) moonless night time:  1215 monocular observation:  323

  9. 1998 1999 2000 2001 2002 HiRes-1Operations Cumulative (05/28/97-11/17/02) moonless night time:  7642 monocular observation:  3563 7.45% duty cycle including shutdown (~20%) time Monday Nov. 18 was Day 2000

  10. Stereo Observations • Full stereo operation in coincidence with HiRes-2 since November 1999. • During 2000: added Auto-Pilot system for routine start and shutdown to maximize observation time and to improve security. • Both sites were achieving target duty cycle of 10% when 9/11 event occurred.

  11. 2000 2001 2002 HiRes-1Operations Stereo Era (11/15/99 - 10/01/02) moonless night time:  4164 HiRes-1 observation:  1688 Stereo observation:  968

  12. Since Sep. 25, 2001 • Dugway has been operating under heightened security: only personnel with military SECRET or DOE L-level clearance are allowed to operate detectors. • Subcontract Los Alamos National Lab staff • 7 staff physicists (4 are HiRes collaborators). • 3 engineer/technicians.

  13. Restart • Successful restart in May of 2002 with 2 LANL personnel at EACH HiRes site. • To reduce costs, restrict observations to nights with > 5 hours of darkness • Remote operation of HiRes-1 site from University of Utah since 6/2002

  14. Remote HiRes-1 Operations • Remote operations of HiRes-1 was planned well before 9/11 event: • New Army regulation requiring two operators at each site added significantly to manpower requirement for stereo observations. • HiRes-1 was logical choice for remote ops: • More convenient for pre- and post-run stops. • Fewer detector units: easier to operate.

  15. HiRes-1 Upgrades before 9/01 • University of Adelaide provided new scanning cloud monitor • More sensitive than in-situ visual observation

  16. HiRes-1 Upgrades before 9/01 • Failsafe curtains added to all HiRes-1 mirrors: • protects all mirrors against direct sunlight • photo sensor drops curtains when light level reaches ~30 min. before sunrise or in case of power failure. • Backup diesel generator for closing doors in case of power failure (use by HiRes-2 runners). • UPS systems added to all critical electronic equipment in Central Facility. • Purchased remote power controller system.

  17. HiRes-1 Upgrades since 5/02 • Installed remote power controllers (Baytech RPC and DS-3 systems): • RS-232 interfaced power strips placed between equipment and respective UPS modules • Critical equipment can be power-cycled via dial-up. • Dial-up modem disconnects automatically after 60 min. • Modem has fail-safe watch-dog timer which will restart the module in case of lock-up. • High Voltage for entire site enabled/disabled via remotely controlled power switch

  18. HiRes-1 Operating Procedure • HiRes-1 detector started at 3.5 hours before “run” time (moonset or end of astronomical Twilight) to diagnose readout electronics problems. • Runners visit HiRes-1 at 3 hours before “run” time to check status of curtains and doors and to swap-out defective readout modules (max. stay: 30 min). • After shutdown, runners wait for confirmation of door closure at HiRes-1. They visit HiRes-1 on return trip only in the event of door failure.

  19. HiRes-1 Remote Run Control • HiRes-1 run control uses the VNC remote session client/server system • VNC sessions stay up in the event of network failure • Interrupted session can be resumed from HiRes-2 or using modem link • 3 nights of modem- only running so far

  20. Sensitive Tests at Dugway HiRes-1Operations Remote HiRes-1 Operation Since Restart (05/02-10/02) moonless night time:  392 *** HiRes-1 observation:  194 (323) Stereo observation:  156 (processed.) *** nights > 3 hours of darkness

  21. Future HiRes Operation • Will continue to operate with LANL operators, and for now on nights with > 5 hours of darkness. • Currently contract 1.0 FTE from LANL. • We are applying for clerance for HiRes citizens through our contact at LLNL. • One member of HiRes has received clearance and is already taking on a heavy load of shifts • Four more members of HiRes have been “finger-printed”: clearance expected over the next 6-12 months.

  22. Future HiRes Operation • Those already fingerprinted includes one engineer and one technician. • Five more applications are in the pipeline: expected to come through over the next 2 years. • Expect to ramp-down LANL sub-contract: • 1.0 FTE in year 1 • 0.75 FTE in year 2 • 0.5 FTE during years 3-5. • Also explore other possibilities to reduce costs.

  23. Future HiRes Operation • As more clearances come through we will return operating on all nights > 3 hours of darkness. Expect this to be possible before FY2005. • Results of operations from 2002 are very encouraging. • We anticipate to be able to achieve 10% duty cycle for the last 4 years of this proposal.

  24. HiRes-1 Operational Issues • Major repairs restricted to pre-arranged “access” days (1-2 before each run) + emergency access • this will improve as our technical staff get clerance • Moving parts (garage doors and curtains) : • have installed small (~400 VA) UPS units to prevent curtains from deploying during power glitch. • installation of fail-safe curtain position sensors within 30 days: will eliminate need for routine pre-run visits. • installation of redundant backup door control and sensing system planned for the next 2 months.

  25. HiRes-1 Operational Issues • Remote operations puts more demand on network reliability. • Current arrangement with Utah Education Network (UEN) is convoluted and has many points of failure • Propose dedicated T1 line ($1k/month) from U.of U. to HiRes-1. • Remote operations make us more vulnerable to power glitches and brown-outs. • These events are occurring more frequently • Propose to purchase 3kVA UPS units for HiRes-1 mirrors.

  26. HiRes-1 Upgrade • A number of the components used for HiRes-1 read-out system (designed in 1990) are no longer available from manufacturers. • HiRes-1 limits the low-energy (< 31018 eV) stereo aperture (elevation limited to < 17 deg.) • Sample-and-hold read-out limits the precision of reconstruction. • Upgrade to FADC system + some “ring-2,3” mirrors (between 17 and 45 deg. in evelation) proposed over the next 5 years.

  27. Summary • HiRes-1 reliably operated since 1997. • Successful restart since 5/2002 with 323 hours of data collected to date. • Successful and reliable remote operations since 6/2002. • Return to >3 hour observational regime by FY2005 (year 2)  expect to achieve 10% duty cycle.

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