tunnel electronics baseline issues snowmass workshop august 25, 2005 ray larsen for slac ilc group
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Tunnel Electronics Baseline Issues
Snowmass WorkshopAugust 25, 2005
Ray Larsen for SLAC ILC Group
August 25, 2005 Tunnel Electronics R.S. Larsen 2
Outline Motivation: Cost Reduction Risks: Radiation Damage, Lower Availability Fy2000 Study New Developments Proposed R&D Baseline Recommendations
August 25, 2005 Tunnel Electronics R.S. Larsen 3
NLC Cost Reduction Study Fy2000 Lehman cost model: 1 Tunnel - Alcoves every 235m Electronics near sensors in concrete wall “TEE’s”
Eliminate long-haul cables Sacrificial short-hauls (pigtails) Protect COTS electronics against gammas, neutrons Serial digitized data out on copper, fiber Consider Wireless for slow data, Robotics servicing
BPMs, LLRF, vacuum pumps-gauges-valves, magnet movers, temperature, MPS-BCS-PPS... Gigabit links to next level - BW not an issue.
August 25, 2005 Tunnel Electronics R.S. Larsen 4
TEE Basic Models**Preliminary - S. Rokni & S. Roessler
August 25, 2005 Tunnel Electronics R.S. Larsen 5
August 25, 2005 Tunnel Electronics R.S. Larsen 6
Fy2000 Results Radiation protection “would likely work” Concrete wall depth marginal– extra bumps easy if
casting. Civil cost not estimated. Packaging, cooling seems feasible All connectors on module rear for robotic
remove/replace RF coax plug-in connectors a major issue Robotic economic study done (J. Cornuelle w/ Stanford
ME dept.) – seems feasible. Significant cost reductions possible
August 25, 2005 Tunnel Electronics R.S. Larsen 7
Lehman ($253K) vs. CD 0.4 ($118K)
TEE Cost Reduction $135M (53%)
0
10
20
30
40
50
60
70
80
LLRf BPMs Movers Vacuum Racks TEEs
Lehman CD 0.4
August 25, 2005 Tunnel Electronics R.S. Larsen 8
ILC Proposed Tunnel ModelsDual Shallow or Deep Tunnels
Two versions for MK Access every n Km Lateral penetrations every ~40
m for short WG or cable feeds Fig. A: Instrumentation in
Aux. Tunnel, long cables to sensors
Fig. B: Instrumentation in Beam Tunnel, short cables to sensors, data cables to Aux tunnelMK
(X)
I,M(X)
KB
I, B
(A)
(B)
Cables
Cables +WG
August 25, 2005 Tunnel Electronics R.S. Larsen 9
2-Tunnel Model w/~Penetrations
Dual Serial
Gigabit Trays
Dual DC
Power Buses
Instrumentation Electronics
Alcove
Power Electronics
Alcove
Cooling
AC Power Buses & Pnls
Beamline Devices Control/
Data In/Out
Module ServiceSystem
ModulatorsPower
Supplies
Radiation Protection
~6in. Penetration
Module Tray
August 25, 2005 Tunnel Electronics R.S. Larsen 10
ILC Linac Instrumentation (~40m)
Cryomodule 1 Cryomodule 2 Cryomodule 3
Cavities 1-12
Cavity Tuner Motor (2)
Coupler (3) Tuner Motor (1 per) Window Arc Detect (2 per) Vacuum Pump (1per)
Piezo Tuner (2)
HOM BPM Ports (2)
RF Power Pickup (1)
Coupler Pfwd Prev
Cryo Resistive Sensors (12) (4/Cryomodule)
K
LLRF Vector Sum
Cryo Vacuum Pumps (6) 2/Cryomodule
SC Quad (1) SC Corrector (2) Cavity BPM (1)
~1m
ATCA StandardModule
August 25, 2005 Tunnel Electronics R.S. Larsen 11
Proposed New StudyIn-Tunnel Instrumentation
2-Tunnel instrument model never estimated. Radiation modeling for electronics just starting
New state-of-art circuit, packaging models needed BPMs, LLRF, tuners, movers, cryo temperature,
vacuum, etc. Standard module designs, mezzanine cards, hot swap Robotic module replacement
August 25, 2005 Tunnel Electronics R.S. Larsen 12
New Commercial Developments Since Fy2000
High density plug connectors up to 5 GHz available (ATCA) – interface on rear adapters
High Availability standard architectures (ATCA) Hot swap modules demonstrated (ATCA) New cooling options available including liquid leak-less
plugs on backplane (Rittal, ATCA) Gigabit communications w/ embedded processor chips,
$5 Wireless chips, high speed 12-14 bit sampler ADC-DAC commodity products, more to come…..
Cannot afford to NOT explore latest technologies.
August 25, 2005 Tunnel Electronics R.S. Larsen 13
Baseline Recommendation BCD R&D:
Re-model all systems to state-of-art electronics, HA packaging, communications
Estimate BCD model - all electronics in Auxiliary tunnel, short penetrations to beam tunnel (10m) at ~40m
ACD R&D: Redefine tunnel packaging, protection scenarios for cold
machine, COTS electronics Study Rad-Hard design for vac-ion pumps Study Robotics maintenance model Re-estimate potential cost-availability benefits
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