1. Task # 3 Task #3 - 100kW Target Station Layout proposal Presented by L.Bruno CERN AB Experimental Areas, Targets and Secondary Beams Group

2. Task # 3 The 100kW Target Proposal of a target station layout OUTLINE 1. Assumptions & requirements 2. Eng.approach & station layout 3. Main sub-assemblies 4. 100kW liquid metal target 5. Summary of Task#3 on-going activities

3. Task # 3 Assumptions & Requirements The 100kW target will be of proven conventional design, such as the TRIUMPH or CERN ISOLDE type ; The design activity shall be a site-independent, „green- field“ study; Radiation safety issues are the main concern to be addressed by the engineering choices; The target station shall allow remote handling of any sub- assembly during routine and exceptional maintenance; Downtime periods shall be limited to increase the target availability. The assumtpions, constrains and requirements of the 100kW target station are described in a functional specification (CERN EDMS doc.#752679).

4. Task # 3  Modular target station “block”  To be replicated in an array of independent stations;  supported by a target service building (labs, workshops, offices);  Three-level containment system  1 st level: target RIB module;  2 nd level: target station vessel;  3 rd level: target hot cell.  Vertical concept  Vertical extraction of the RIB beam;  Vertical handling of sub-assemblies by crane;  Vertical slender support structures;  Underground construction  Target located at -11m (“irradiation level”);  Remote handling at -5m (“handling level”);  Separator’s at 0m (“experimental level”); The details of the engineering proposal are described in a draft engineering conceptual design note (CERN EDMS doc.#889218). Engineering approach

5. Task # 3 Schematic EURISOL Layout Only a schematic layout of the EURISOL facility was available in the final report of the EURISOL Feasibility Study. That has been the starting point of to develop the present proposal. Primary Beam Complex ISOL Complex

6. Task # 3 Basic Engineering choice Station vertical cut – Beam view Target pit Ancyllary Area A (Cooling) Ancyllary Area B (Electric) Sliding shield Hot cell enclosure (3 rd cont. ) Roof plug p. beam Leak-tight penetrations Irradiation Level Handling Level Surface Level The basic engineering choice for the 100kW EURISOL target is to locate the target station within an  -  hot cell in a target pit. The hot cell enclosure defines the 3 rd level of the containment system.

7. Task # 3 Target Handling Station vertical cut – Proton beam plane Surface level p.beam RIB beam Shielded door Remote handling corridor (Served by a power manipulator) Hot cell enclosure Hot cell Operators Service corridor (Always accessible) Downstream Area (No access required) Primary beam corridor Target pit Target lifting system The irradiated target is first lifted within the hot cell and then brought away by a power manipulator to a storage area. Routine and exceptional maintenance is performed remotely in the hot cell. No shielded transport cask is required.

8. Task # 3 Target station building Target irradiation level – Plan view sketch p.beam Ancyllary Area A (Cooling) Ancyllary Area B (Electric) Access corridor to the ancillary areas Target pit Leak-tight penetrations HV Station Transformer P.Beam corridor The modular target bulding has a footprint of 16x20 m 2 (width x depth). The irradiation level hosts the ancillary services of the target station. Two separated areas are envisaged for fluids and power supply/electronics. The ancillary areas shall be accessible for maintenance while neighboring stations close to the one being serviced are in operation Downstream Area

9. Task # 3 Target station building Target handling level – Plan view sketch Remote handling corridor (Served by a power manipulator) Service corridor (Always accessible) other stations/ service building Hot cell Operators Hot cell enclosure Sliding shield Shielded door Remote handling is performed in a  -  hot cell by telescopic manipulators. Human access to the hot cell operators room is requested only during target station shut-down and with closed sliding shield. The cell is accessible via a shielded door from a corridor served by a power manipulator The remote handling corridor is a potentially contaminated area. Exceptional access to the hot cell enclosure is possible through a roof plug during installation and decommissioning

10. Task # 3 Target station assembly Schematic cross-sections Beam view Side view Iron shielding (under vacuum) Dump module The target station is enclosed in a He-filled cylindrical vessel embedded in a massive cast-iron shielding kept under vacuum. Helium filling is envisaged to monitor the leak- tightness of the safety barriers. He-filled vessel (2 nd containment) Leak-tight penetrations

11. Task # 3 Target station core Main sub-assemblies Inside the target station vessel all sub-assemblies are suspended within a barrel. The vessel dome is remotely opened and lifted up together with the target during routine exchange. All sub-assemblies are provided with automatic couplings and can be remotely extracted for maintenance.

12. Task # 3 Target module Vertical cut – Beam view The 100kW target is suspended at the bottom of a module where the RIB beam steering and focussing optics is located. Should a rad hard pump be not feasible, cryopumping should be envisaged. During routine target exchange, the module is lifted into the hot cell handling bay, the spent target is de-coupled, evacuated by the power manipulator and a new one installed. +60kV 0kV

13. Task # 3 100kW liquid metal target Overview by E.Noah

14. Task # 3 Liquid metal loop prototype Overview by E.Noah

15. Task # 3 Task #3 Milestones Summary by T.Stora M1.2 (SiC): Pending M1.4 (SiC test ):TN03-25-2008-10 published on website M2.3 ( TARPIPE ):Irradiation finished due to Injector 1 failure at PSI. 2 nd target level could not be irradiated. M2.4 Sample extraction and analysis under preparation M3.3 ( oxide@TRIUMF ) : planned Sept 2008 M4.4 (“Bivalve” test): TN-03-25-2008-00(?) published on web site and in addition… - Target station tentative layout circulating for feedback/comments; - Molten metal loop prototype in collaboration with IPUL (E. Noah); - 6 He production tests planned at ISOLDE for  -beam (1 st week July); - Considerations on beam steering on refractory metal foils published.