Tunnel Electronics Baseline Issues Snowmass Workshop August 25, 2005 Ray Larsen for SLAC ILC Group.

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

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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

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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