1. 14-Jun-161 Status of Horizontal Test Stand (HTS-2) Development Efforts Pradeep Kush, Prashant Khare, RRCAT, India Team Members: S.Gilankar, Rupul Ghosh, R.Chaube Abhishek Jain A.Laxminarayanan

2. 14-Jun-162 Introduction to HTS Design Effort

3. Introduction to the Task 6/14/20163 A Horizontal Test Stand (HTS-2) is needed to test dressed SCRF cavities before they are finally placed in the cryomodule. HTS-1 is working at FNAL (Testing single 1.3 GHz cavity). HTS-2 has to fulfill following requirement, different from HTS-1: 1.To test: two SCRF cavities of 650 MHz or any combinations with 1.3 GHz cavities or SC Magnet at a time. 2.The cavities will operate in CW mode – higher cryogenic heat load. 3.Operational problems of HTS-1 should be addressed. The task has become tough because: A) Apart from document on engineering design of vacuum vessel no other report /design note etc is available on HTS-1. B) Issues of Subsystems like power coupler, cryogenic circuit, magnet, feed box are now trickling in, when the vessel and other systems are already finalized.

4. Status of HTS Development A.3-D Model completed to visualize component assembly. The diameter was taken as 46 inches B.Vacuum vessel design complete. 2-D drawings completed. C.Frame bridge design almost complete. Options considered: a)SS frame bridge - long cool down time. b)Aluminum frame bridge - A prototype in Al fabricated. A.Cryogenic Support post designed. Scaled down prototype tested. B. Focus of present work is designing of internal Cryogenic circuit.

5. A. 3-D MODEL OF HTS FOR SCRF CAVITIES OF 1300 / 650MHZ 3-D MODEL OF HTS WITH TWO AVITIES OF 650MHZ

6. Dimensions of HTS-2 vessel (2 nd Revision) Feed Can port Support Post Port 3-D model Of Vacuum Vessel with changes incorporated after feedback from FNAL (2 rd revision)

7. Dimensions of HTS-2 vessel (3 rd Revision) 3-D model Of Vacuum Vessel with changes incorporated after feedback from FNAL (3 rd revision) O.D. 1168 mm 3500 mm 2574 mm 2557 mm

8. Preliminary vacuum vessel of HTS-2 Designed value Remark Diameter of SS 304 Vessel*46 inchConsidering testing of 650 MHz cavity also Overall Length of Vessel137.7 inchConsidering testing of two SCRF cavities Nominal Thickness of Vessel 0.375 inch B. Vacuum Vessel Design Parameters Verified with ASME Boiler and Pressure Vessel Code Sec.VIII Div 1,(2004) It was suggested from FNAL that effect of weight of feed can on the vacuum vessel should be analyzed through FEA. This has been completed. (next slide)

9. FEM Simulation for Vacuum Vessel Deflection 600 Kg of circumferential Load 500 Kg of Load on each support post Material : SS 304

10. Max. Deflection in vertical direction :- 87 Micron Max. Von-Mises Stress:18 MPa FEM Simulation for Vacuum Vessel Deflection

11. Calculations Completed for Vacuum Vessel of HTS-2 Following Calculations Have been completed for Vacuum Vessel of HTS-2 Calculations for the Vacuum Vessel Cylindrical Shell Thickness - As an external pressure vessel (as per UG-28 of ASME VIII, Div. I, Edition 2004 ) - Verified as internal pressure vessel (as per UG-27 of ASME VIII, Div. I ) The Permissible Out of Roundness of the Vessel Cylindrical Shell Thickness (as per UG80 of ASME VIII Div. I Edition 2004) Analysis and Calculations for the Stiffening Rings (as per UG-29, ASME VIII, Div. 1) Calculations and Analysis for all the vessel Shell Openings/Ports - (external as well as for internal pressure)

12. Design Calculations Ctd. Discussions on the Saddle Support Design Referred “Pressure Vessel Handbook” 7th edition by E. Megyesy, “Process equipment Design” book by Lloyd Brownell and Edwin H. publisher Young, Wiley Eastern Ltd. and Paper entitled “Stresses in large Horizontal Cylindrical pressure Vessel on two saddle Support” by Zick Initial Relief System Calculations Referred Vacuum vessel engineering note for SMTA Horizontal test Cryostat (CGA-1.3-1995)

13. C. Design of Frame Bridge FEA for cool down is in progress. Initial results show long cool down time for SS structure. We are evaluating options with aluminum. Structural analysis shows that both configurations are OK.

14. Deflection pattern in HTS I type of SS structure 3 m long structure for HTS II using HTS I type box and rail section Maximum deflection 150 micron Material SS 304

15. Two Alternate schemes for HTS II structure Replacing the box section of HTS- I by an ‘I’ section. SS 304 Maximum deflection value in this case is about 32 microns Material SS 304 Replacing the box- section of HTS- I by a ‘Box section’. Al 6061-T6 Maximum deflection value in this case is about 54.8 microns. The advantage of Al comes from faster cool down Material 6061-T6

16. Full Scale Prototype under fabrication Al 6061 – T6

17. D. Design of Cryogenic Support Post June 14, 201617 F i Max Axial Load Carried by Inner Joint F o Max Axial Load Carried by Outer Joint P i Contact Pressure at Inner Joint P o Contact Pressure at Outer Joint ‘E’ -- Young’s Modulus ‘μ’ -- Poisson’s Ratio of Materials ‘f’ -- Coefficient of Friction between G11 Tube and Disc/Ring δ i Diametral Interference between Tube and Inner Disc δ o Diametral Clearance between Tube and Outer Ring

18. Design Complete- Spread Sheet awaiting final dimensions June 14, 201618

19. Internal Cryogenic Circuit LL in the End Discussion is going on to accommodate cryogenic circuit in the available space The space was kept with only one LL dewar like in HTS -1. But now due to this new cryogenic circuit we are trying to accommodate cryogenic circuit in the available space E. Preliminary Cryogen Supply Scheme for Horizontal Test Stand

20. LL in the middle

21. LL Can Option 1 LL Can Option 2 LL Can Option 3 (d=120mm, end of cyostat) (d=90mm, end of cyostat) (d=120mm, middle of cyostat)

22. Cavities as located in HTS 2 Above configuration Modeled at RRCAT

24. 80K shield Other chimney In this concept, pipes foul with thermal shield on actual modeling Above configuration Modeled at RRCAT

25. Another Configuration proposed by RRCAT

26. Another View Configuration proposed by RRCAT

27. Configuration proposed by RRCAT

28. Thank You