PUMPING IFE CHAMBERS * (5m R case) 1 C. A. Gentile, 1 C. Priniski, 2 J. Sethian, 1 W. Blanchard, 1 L. Ciebiera, 1 F. Dahlgren, 1 G. Gettelfinger, 1 C.

PUMPING IFE CHAMBERS *PUMPING IFE CHAMBERS *(5m R case)(5m R case)

1C. A. Gentile, 1C. Priniski, 2J. Sethian, 1W. Blanchard, 1L. Ciebiera, 1F. Dahlgren, 1G. Gettelfinger, 1C. Jun, 1S. Langish

1 Princeton Plasma Physics Laboratory 2 Naval Research Laboratory

HAPLUniversity of Rochester/LLE

November 8 - 9, 2005

* Please see poster: C. Priniski, et al. on VPS

1.29*106 liters

6.5mToroidal

Duct

5.72*106 liters

11m LaserPorts

1.58*106 liters

7m LaserPorts

6.11*105

liters

5m PlenumDucts

Chambers Evaluated for VPS

Requirement Action

Design vacuum pumping system to meet requirements of IFE target chamber(s) including a 5m R chamber in accordance with system specifications

Proposed conceptual design employing conventional components indicates that system requirements can be achieved

Provide a cost-effective/ economical low maintenance system to meet requirements

Employ pumping system for multiple purposes (i.e., TMP backing pumps also configured to rough down target chamber)

Employ commercial off- the-shelf components with good operational history

Provide a system for “eventual” D-T operations

Proposed system configured to transition to D-T operations

Requirements:Requirements:

Design Parameters:Design Parameters:

– Employ commercial off-the-shelf (COTS) components to minimize costs.

– Employ high efficiency turbo molecular pumps backed by roughing pumps.

– Employ components which have good operational history in similar environments.

– Develop an accurate cost estimate from vendors; detailed quotes.

– Design system to transition to D-T operations with minimal modifications.

– Design system to meet base pressure and operation pressure in accordance with 5 Hz and higher (10 Hz) repetition rate (burst) operation.

– Employ components which have minimal maintenance requirements.

System Specifications:System Specifications:

– 5m R Target Chamber Dimensions• Inner radius = 5 m

• Target chamber volume 523,600 liters

• Total laser duct volume 87,560 liters

• Total volume (with 40 beam ports) 611,160 liters

– Target Chamber Pressures• Operational base pressure = 0.5 mtorr

• Gas load 60 torr-liters/sec (10 Hz burst mode)

• Total system in-leakage < 1x10-5 torr-liters/sec

Pumping CandidatesType Vapor Diffusion

PumpTurbomolecular

Pump (TMP)Cryogenic

Capital Cost Low Moderate High

Pumping Effectiveness

Excellent Excellent Excellent

Maintenance High Low High

Reliability Excellent Excellent Excellent

Operation Simple/Moderate Simple Moderate

Issues Possible backstreaming of oil onto optics and oil

into foreline

None Gas loading on panels, pump time vs. regen time

Other

Concerns

Large amount of high temperature oil at risk

None Labor intensive operation

Cost of Operation Low/Medium

(oil at ~ $500/gallon) and cryogenic fluids

Low High (energy/labor costs due to helium refrigeration and

operations)

Impact on operation Oil on optics None Regeneration time

Vacuum Pumping System:Vacuum Pumping System:• 5m R Target Chamber Pumping

• TMP pumping through plenum ducts • TMP’s (Varian-V 6000) = 30 TMP’s /duct• TMPS’s total =60• TMP backing pumps (mechanical & roots blowers) = 1/6

TMP’s• Backing pumps total = 10

• Outboard Beam Duct Pumping• TMP’s (Varian-V 2000 HT) = 1/beam port• TMPS’s total =40

• System Pumpdown• From 760 torr to 0.5 mtorr (initial conditions) < 1 day

Target InputTarget Input

Gas HoldingTank

Gas HoldingTank

Gas HoldingTank

Gas HoldingTank

Mechanical Booster Vacuum Pumping

System

ExhaustStack

Inventory Monitor/RGACryogenic

IsotopeSeparation

PROCESSPROCESS

2 StageMetal Bellows Pump

Waste or Recycled

Waste

Type B(>1080 Ci)

Type A(<1080 Ci)

MolecularSieve Bed Containers

Tritium Gas ProcessSystem (Catalytic

Conversion to Oxide)

Inventory Monitor

Leak MitigationCleanup System

Blowers

Target M

anufa

cturing

Target M

anufa

cturing

RECOVERYRECOVERY

HOLDINGHOLDING

Pumping System and

Interface

CHAMBERCHAMBER

VPS• Two pump duct configuration

• Pump duct (nominal) 2m D, 10m L

• Two VPS Pods

• 30 TMP’s/pod

• TMP’s backed by backing pumps/blower

Laser Plenum Pumping

Turbo-V 2000 HT

10” VAT Valve

Operational Pressure(s)

• Two pod (30 TMP’s/pod) configuration

• VPS (eff.)pumping speed ~ 182,000 l/sec

• Design Basis Pressure = 0.5 mtorr

• 5 Hz operation/gas load @ 30 torr-l/sec, operational pressure = 0.16 mtorr

• 10 Hz operation/gas load @ 60 torr-l/sec, operational pressure = 0.33 mtorr

Commercial Off-The-Shelf Dome (prefab) Candidate

Vacuum Pumping Pod (TMP) Configuration

Pod (Bottom) Flat Plate

Pod (Clam Shell) Configuration

Vacuum System Component Cost EstimateVacuum System Component Cost EstimateKey Equipment Name Unit Cost Qty Total

Qty Discount

Discount Total Total

A Varian Turbo-V 6000 70,000.00$ 60 4,200,000.00$ 20% 840,000.00$ 3,360,000.00$

BVarian Turbo-V 2000 HT (on outboard beam tube)

25,000.00$ 40 1,000,000.00$ 20% 200,000.00$ 800,000.00$

C Kinney KMBD -2000 Backing Pumps 41,000.00$ 10 410,000.00$ 20% 82,000.00$ 328,000.00$

DTMP Pod isolation valve (VAT valves, 20" throughput)

20,000.00$ 60 1,200,000.00$ 20% 240,000.00$ 960,000.00$

EOutboard beam duct (TMP) Isolation Valves (VAT valves, 10" throughput)

12,000.00$ 40 480,000.00$ 20% 96,000.00$ 384,000.00$

FRoughing Valves (between TMP exhaust/Kinney Inlet)

8,000.00$ 10 80,000.00$ 20% 16,000.00$ 64,000.00$

G Gate Valves (after Kinney discharge) 8,000.00$ 10 80,000.00$ 20% 16,000.00$ 64,000.00$

HDycor RGA (0-200 AMU w/ pumping system)

23,000.00$ 2 46,000.00$ 5% 2,300.00$ 43,700.00$

I Instrumentation and Control 250,000.00$ 250,000.00$ 0% -$ 250,000.00$

JTarget Chamber Isolation Valves (for roughing pump interface-VAT valves, 8" throughput)

8,000.00$ 2 16,000.00$ 10% 1,600.00$ 14,400.00$

K Seals 500.00$ 190 95,000.00$ 5% 4,750.00$ 95,000.00$

L Gas Holding Tanks (10 m3) 150,000.00$ 4 600,000.00$ 0% -$ 600,000.00$

M Pods and Interfacing Piping 500,000.00$ 500,000.00$ 0% -$ 500,000.00$

N High Vacuum Ion Gage 5,000.00$ 4 20,000.00$ 0% -$ 20,000.00$

O Pod Isolation Valve 150,000.00$ 2 300,000.00$ 0% -$ 300,000.00$

Estimated Totals 9,277,000.00$ 1,498,650.00$ 7,783,100.00$