1. 1Managed by UT-Battelle for the U.S. Department of Energy NF/IDS Hg Vessel Layout 30 Jun 09 Cryostat 2 Front Drain Mercury Vessel Concept Matthew F. Glisson Van Graves

2. 2Managed by UT-Battelle for the U.S. Department of Energy NF/IDS Hg Vessel Layout 30 Jun 09 Front Drain Views Investigated possibility of having the Hg drain from the nozzle end of the cryostat Based on Study 2 cryostat layout

3. 3Managed by UT-Battelle for the U.S. Department of Energy NF/IDS Hg Vessel Layout 30 Jun 09 Cross Section View Mercury Chamber extends forward under resistive magnets Allows the mercury exiting the vessel to flow out the front of the cryostat

4. 4Managed by UT-Battelle for the U.S. Department of Energy NF/IDS Hg Vessel Layout 30 Jun 09 Nozzle End View Extended portion of chamber fills with mercury providing shielding to the SC magnets below Connects to gravity drain (round tube, center) and contains two channels for mercury overflow (square tube, one shown)

5. 5Managed by UT-Battelle for the U.S. Department of Energy NF/IDS Hg Vessel Layout 30 Jun 09 Overflow Drainage Vertical portion of overflow channel determines the depth of mercury Vessel floor sloped at 1°– 2° for the mercury to flow out the gravity drain or overflow channels

6. 6Managed by UT-Battelle for the U.S. Department of Energy NF/IDS Hg Vessel Layout 30 Jun 09 Overflow Channel Section View Space between resistive and SC magnets should be maximized for this drainage approach Space in current design: 9.3 cm Resistive magnet jacket not shown

7. 7Managed by UT-Battelle for the U.S. Department of Energy NF/IDS Hg Vessel Layout 30 Jun 09 Beam/Jet Dump Region Mercury jet (blue line) and proton beam (red line) Vessel length to be determined Pool depth increased over earlier concept

8. 8Managed by UT-Battelle for the U.S. Department of Energy NF/IDS Hg Vessel Layout 30 Jun 09 Approximate Chamber Dimensions (cm)

9. 9Managed by UT-Battelle for the U.S. Department of Energy NF/IDS Hg Vessel Layout 30 Jun 09 Chamber Front View with Dimensions (cm)

10. 10Managed by UT-Battelle for the U.S. Department of Energy NF/IDS Hg Vessel Layout 30 Jun 09 Chamber Isometric View Fabrication issues will need to be considered Slope feature can be internal or external (shown)

11. 11Managed by UT-Battelle for the U.S. Department of Energy NF/IDS Hg Vessel Layout 30 Jun 09 Observations Mercury pool is deeper than in downstream drain concept – Should positively affect surface fluctuations (waves) Mechanically avoids trapping cryostat by Hg vessel RH handling of vessel should be easier Space between resistive and SC magnets needs to be maximized in future design concepts Downstream beam window will not be as accessible if vessel ends in middle of cryostat