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Mercury Chamber Update V. Graves NF-IDS Meeting October 4, 2011.

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Presentation on theme: "Mercury Chamber Update V. Graves NF-IDS Meeting October 4, 2011."— Presentation transcript:

1 Mercury Chamber Update V. Graves NF-IDS Meeting October 4, 2011

2 2Managed by UT-Battelle for the U.S. Department of Energy Mercury Chamber Update Oct 2011 Starting Point: Coil and Shielding Concept IDS120H

3 3Managed by UT-Battelle for the U.S. Department of Energy Mercury Chamber Update Oct 2011 Mercury Chamber Basics Chamber serves as both jet and beam dumps – Chamber must encompass the nozzle tip No openings into chamber during operation – Mercury flows in a closed loop – Likely will be double-walled for mercury containment, possibly water cooled No embedded sensors Gravity drain of mercury required – Bulk flow exits chamber via overflow drain(s) – Maintenance drain for beam-off operations Penetrations (ports) into chamber – Nozzle – Hg drains (overflow and maintenance) – Vents (in and out) – Beam windows (upstream and downstream) – Shell cooling?

4 4Managed by UT-Battelle for the U.S. Department of Energy Mercury Chamber Update Oct 2011 Initial Concepts for IDS120h Mercury Chamber Axisymmetric chamber design requires displacement of significant tungsten shielding Drainage system located under resistive coils Beam Jet Splash Mitigation Beam Window Mercury Exit/Drain Tungsten Shielding Mercury Pool SC Coils

5 5Managed by UT-Battelle for the U.S. Department of Energy Mercury Chamber Update Oct D Isometrics Downstream Beam Window Drainage Notch Overflow & Maintenance Drains Nozzle, Beam Pipe, Vents Upstream View Downstream View

6 6Managed by UT-Battelle for the U.S. Department of Energy Mercury Chamber Update Oct 2011 Conceptual Chamber Dimensions (cm)

7 7Managed by UT-Battelle for the U.S. Department of Energy Mercury Chamber Update Oct 2011 Comments on this Concept All bottom surfaces sloped for drainage Pool width maximized Splash & wave mitigation space and depth available Accommodates curved beam trajectory Loss of top and side tungsten shielding Resistive coil shielding would have to be a separate component Support of chamber and mercury required (~6ton) 83cm

8 8Managed by UT-Battelle for the U.S. Department of Energy Mercury Chamber Update Oct 2011 Shielding Loss IDS120h Shielding Shielding for Axisymmetric Mercury Chamber

9 9Managed by UT-Battelle for the U.S. Department of Energy Mercury Chamber Update Oct 2011 Mercury Chamber Front End Prefer single, closed volume chamber (no seals) for mercury jet, pool, and drain Assume all required ports on upstream end – Hg nozzle, beam pipe, 2 vents, 3 drains – Must have adequate length to exit SC 1 Functional in concept, but not how it would be implemented

10 10Managed by UT-Battelle for the U.S. Department of Energy Mercury Chamber Update Oct 2011 Beam Pipe and Nozzle Small angles in nozzle beam pipe cause some mechanical issues SC coil design causes curved beam path trajectory well upstream of target, significantly affects beam pipe Plan View Elevation View View Inside Chamber Looking down beam pipe Beam inside beam pipe

11 11Managed by UT-Battelle for the U.S. Department of Energy Mercury Chamber Update Oct 2011 Nozzle Cartridge Nozzle module placement critical to facility operations – Repeatable and rugged design required for remote operations Long slender pipes don’t lend themselves to this scheme NOT THIS WELDMENT CONCEPT MACHINED BLOCK(S) FOR RIGIDITY AND ACCURACY Could also implement via “cartridges” which insert into the larger block Cooling will be needed Drainage system implemented in similar fashion Provides some structural support for remote handling Must also provide space for resistive coil utilities

12 12Managed by UT-Battelle for the U.S. Department of Energy Mercury Chamber Update Oct 2011 Minimal Width Chamber Concept Minimize shielding removal Non-axisymmetric design Narrower mercury pool and drainage system All other issues previously discussed apply as well

13 13Managed by UT-Battelle for the U.S. Department of Energy Mercury Chamber Update Oct 2011 Minimal Width Chamber Preserves more tungsten shielding Width determined by downstream beam window Creates narrower mercury pool (35cm vs. 83cm) – Wave / splash mitigation issues, beam stopping

14 14Managed by UT-Battelle for the U.S. Department of Energy Mercury Chamber Update Oct 2011 Minimal Width Chamber Isometrics Shielding ShapeChamber in Place (drain not shown)

15 15Managed by UT-Battelle for the U.S. Department of Energy Mercury Chamber Update Oct 2011 Manufacturing Hg chamber encompass hourglass-shaped resistive magnets Very complex geometry, tight positional placement required Machine where possible, minimize welding Insert portion of chamber through magnets, weld downstream components Will have to handle chamber and coils as a single module

16 16Managed by UT-Battelle for the U.S. Department of Energy Mercury Chamber Update Oct 2011 Some Engineering Issues Means of vertical support Double-wall mercury containment – Chamber wall(s) cooling Beam pipe and nozzle mechanical layout Shielding resistive coils Long upstream magnets – More difficult remote handling for inner components – Affects proton beam trajectory well before it impacts target

17 17Managed by UT-Battelle for the U.S. Department of Energy Mercury Chamber Update Oct 2011 Mercury Chamber Wish List Eliminate resistive coils Enlarge resistive coils such that a cylindrical mercury chamber can be pulled through them If above not possible, then an integrated coil/chamber design required Minimize coil length of all upstream magnets


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