1. General overview of WU 11.11.5.2: Cryogenic Distribution for Elliptical Linac Jarosław Fydrych Cryodistribution Project Engineer Preliminary Design Review, ESS Lund 2015-05-20

2. Outline 1.Introduction to CDS for Elliptical Linac 2.ESS-WrUT collaboration history 3.Functional baseline documents (technical specification, L4 requirements, conceptual 3D models) 4.Schedule and milestones 5.Conclusions

3. ESS cryogenic system block diagram Pure Helium Gas Storage 1 Standalone Helium Purifier Helium Recovery System Pure Helium Gas Storage 2 Accelerator Cryoplant Test & Instrument Cryoplant 5 m 3 LHe Tank Target Moderator Cryoplant LHe Mobile Dewars Test Stand Cryodistribution System Instruments & Experiments LN2 Storage Tanks LN2 Mobile Dewars Cryodistribution System for Elliptical Linac Elliptical Cryomodules Test Stand Lund 2 Target Cryodistribution System Hydrogen Circulation Box Hydrogen Moderator Cryodistribution System for Spoke Linac Spoke Cryomodules 20 m 3 LHe Tank

4. Cryogenic Distribution Line (310 m) comprising 43 valve boxes Endbox Cryogenic Transfer Line (75 m) Splitting box Linac CDS – function and layout 21 High Beta Cryomodules (174 m) 9 Medium Beta Cryomodules (75 m) 13 Spoke Cryomodules (54 m) ACCP Superconducting section of the Optimus linac (303 m) Auxiliary process lines Linac Cryogenic Distribution System Layout Cryogenic Distribution System for the ESS linear accelerator is intended for delivering the cooling power from the linac cryoplant to the cryomodules by means of the constant flows of supercritical and cold gaseous helium, at 4.5 K and 40 K, respectively.

5. Cryogenic Distribution Line (310 m) comprising 43 valve boxes Endbox Cryogenic Transfer Line (75 m) Splitting box Linac CDS – function and layout 43 branch cryolines Auxiliary process lines Cryogenic Distribution Line with 43 valve boxes Cryogenic Transfer Line Auxiliary process lines Layout Isometric view Linac Cryogenic Distribution System

6. Endbox Cryogenic Transfer Line (75 m) Splitting box Linac CDS – function and layout Cryogenic Transfer Line Linac Cryogenic Distribution System Cryogenic Distribution Line (255 m, 30 valve boxes) Cryogenic Distribution Line (55 m, 13 valve boxes) 13 branch cryolines CDS for the elliptical linac (Polish in-kind, WrUT) CDS for the spoke linac (French in-kind, CNRS) Cryogenic Distribution Line with 30 valve boxes Cryogenic Distribution Line with 13 valve boxes Auxiliary process lines 30 branch cryolines

7. Cryogenic Transfer Line (75 m) Splitting box CDS for elliptical linac – interfaces Linac Cryogenic Distribution System Cryogenic Distribution Line (255 m, 30 valve boxes) 30 branch cryolines CDS for the elliptical linac Interface to the ACCP Interface to the CDS for Spoke Linac Auxiliary process lines Interfaces to the elliptical cryomodules WP5 Elliptical SRF inc. cryomodules - 21 MBL cryomodules - 9 HBL cryomodules Main interfaces with the other ESS work packages and systems WP11.2 Accelerator cryoplant - ACCP cold box - ACCP warm lines WP11.5.3 CDS for Spoke Linac - cryogenic distribution line - auxiliary process lines WP12 Vacuum system Survey and alignment Integrated control system Conventional power

8. CDS for the elliptical linac - general flow scheme Two main cryogenic circuits: - thermal shield circuit (TS supply and TS return lines) - cold helium circuit (Helium supply and VLP lines)

9. Valve box PID Valve box for the elliptical cryomodule

10. CDS for the elliptical linac – isometric view Valve box Cryoline Jumper connection Auxiliary process lines Interconnection Interface to cryomodule Interface to the ACCP Modular structure of the cryogenic distribution line! Interface to the CDS for Spoke linac

11. ESS-WrUT collaboration history (1/2) May 2013 WrUT responded to the ESS call for expression of interest and indicated interest in contributing to ACCSYS.11: Cryogenics and ACCSYS.11.5 Cryogenic distribution Jan 2014ESS and WrUT initiated cooperation on the ESS Cryogenic Distribution System (phone meeting on 8-Jan) Mar 2014 ESS recognised WrUT as a potential supplier of the major parts of the CDS (meeting at WrUT on 4-Mar) May 2014 Linac CDS was splitinto two parts. WrUT was considered as the main potential in-kind contributor to the CDSs for the elliptical linac and for Lund Test Stand 2 Jun 2014ESS provided to WrUT the specification of the CDS for the elliptical linac (work unit ACCSYS.11.5.2) Sep 2014ESS provided to WrUT the specification of the CDS for Lund Test Stand 2 (work unit ACCSYS.11.5.1)

12. ESS-WrUT collaboration history(2/2) Oct 2014ESS and WrUT discussed in details the scopes of work, schedules and technical aspects of the CDSs for the elliptical linac and for Lund Test Stand 2 (technical meeting at WrUT on 23/24-Oct) 27 Jan 2015ESS and WrUT agreed on the scope, schedule and value of the CDSs for the elliptical linac and for Lund Test Stand 2 04 Feb 2015ESS-WrUT Collaboration Kick-off Meeting (Conceptual 3D models of the CDSs provided to WrUT) Feb-May 2015WrUT have been developing the ESS conceptual design of the CDS for the elliptical linac and the L4 requirements for the CDS interfaces (two technical meetings at WrUT on 4/5/6-Mar and on 1-Apr and 10+ video meetings) 20 May 2015Prelimiary Design Review for the CDS for the elliptical linac (WrUT provided the PDR data package on 5-May; ESS sent questions and comments on 13-May)

13. CDS baseline documentation: 1. Technical specification ESS-0011735: Technical Specification of the Cryogenic Distribution System for the Elliptical Linac ESS-0011309: Interface between the CDS and the elliptical cavity cryomodules ESS-0011308: Interface between the CDS for the elliptical linac and for the CDS for the spoke linac ESS-0012571: Location of the wave guides under the Cryogenic Distribution Line for the elliptical linac Appendix A. Perspective view of the CDS for the elliptical linac Appendix B. Routing and overall dimensions of the CDS for the elliptical linac provided to WrUT in Jun 2014 ESS-0011233: Interface between the ACCP cold box and the CDS ESS-0011310: Interface between the ACCP-WCS and the CDS ESS-0011233: Interface between the ACCP cold box and the CDS ESS-0011310: Interface between the ACCP-WCS and the CDS OBSOLETE ESS-0028495: Interface between the ACCP and the CDS provided to WrUT on 15-Apr-2015

14. 2. L4 requirements for the CDS Provided to WrUT in Feb 2015 Agreed and submitted to DOORS on 5-May-2015

15. 3. L4 requirements for the interfaces Initial lists provided to WrUT in Feb 2015... …are being developed and discussed with the other WPs L4-ACCP-CDS L4-CDS-MBL L4-CDS_EL-CDS_SLL4-CDS-HBL L4-CDS-VAC L4-SA-CDSL4-CDS-CNPW

16. 4. CDS conceptual design model built at ESS Provided to WrUT in Feb 2015 ESS-0026805: Cryogenic distribution line for Elliptical Linac ESS-0026674: Cryogenic Transfer Line

17. 5. Valve box conceptual model built at ESS Provided to WrUT in Feb 2014

18. CDS project schedule (PRIMAVERA P6) WrUT CNRS

19. Conclusions CDS for the elliptical linac is a complex cryodistribution system connecting the ACCP with the 21 high and 9 medium beta cryomodules and with the CDS for the spoke linac. The CDS functional baseline is described in the CDS specification, L4 requirement sets and conceptual 3D models. The CDS will be delivered by Wroclaw University of Technology un the scope of Polish in-kind contribution. ESS-WrUT cooperation began in January 2014 and the CDS project scope, schedule and value were agreed in January 2015. The design phase of the CDS project began in February 2015 (Kick-off Meeting held at ESS on 04-Feb) and should be completed in September 2015 (Critical Design Review is scheduled on 22-Sep).