Conceptual Design and Assembly Process of PANDA Control Dewar

The PANDA Control Dewar is designed for liquid and gas helium supply to solenoids. It consists of a vessel for liquid helium, current leads, thermal shields, valves, gauges, and a vacuum shell. The assembly process involves installation of pipelines, current leads, and thermal shields in stages. Detailed flow schemes and diagrams are provided from the PANDA Collaboration Meeting in June 2018.

• Conceptual Design
• Assembly Process
• PANDA Control Dewar
• Cryogenic System
• Vacuum Technology

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1. PANDA The conceptual design of the control Dewar PANDA Collaboration Meeting 04-08.06.2018, BINP, M.Kholopov

2. PANDA control Dewar The PANDA Dewar is designed to the liquid and gas helium supply solenoid in accordance with the flow scheme. control TL the - transfer lines (TL) connecting refrigerator and control Dewar D1600 2080 - connecting the vacuum vessels of the solenoid cryostat and control Dewar transfer line (Chimney) Control Dewar Chimney Figure 1. General view of the control Dewar. PANDA Collaboration Meeting 04-08.06.2018, BINP, M.Kholopov

3. Control Dewar consists of: 1. a vessel for liquid helium (~480L); 2. current leads; 3. thermal shields cooled by gaseous helium; 4. valves, gauges; 5. vacuum shell. 4 2 1 3 5 Figure 2. The main components of the control Dewar. PANDA Collaboration Meeting 04-08.06.2018, BINP, M.Kholopov

4. PANDA solenoid 2017, Flowscheme with comments of GSI Selected valves that will be used when detector from in the beam position to the assembling area. moving the Figure 3. Process Flow Diagram of the PANDA cryogenic system. PANDA Collaboration Meeting 04-08.06.2018, BINP, M.Kholopov

5. The stages of Assembly of the PANDA control Dewar: 1. Installation of pipelines on the cap plate of the control Dewar Current leads Vessel cap plate -Pipeline 4,2K F red color -Pipeline 5K R violet color -Pipeline 40K F cyan color -Pipeline 80K R blue color He vessel Figure 4. The stage 1. PANDA Collaboration Meeting 04-08.06.2018, BINP, M.Kholopov

6. The stages of Assembly of the PANDA control Dewar: 2. Installation of pipelines on the cap plate of the control Dewar 1100 5K R 40K F 4,2K F 80K R 1850 Figure 4. The stage 2. PANDA Collaboration Meeting 04-08.06.2018, BINP, M.Kholopov

7. The stages of Assembly of the PANDA control Dewar: 3. Installation of the thermal shields in the vacuum shell Thermal shield Vacuum shell 80K Figure 5. The stage 3. PANDA Collaboration Meeting 04-08.06.2018, BINP, M.Kholopov

8. Design of the thermal shields Al sheet S=3mm Al profile 14 -type 1400 Ball support Figure 6. thermal shield. PANDA Collaboration Meeting 04-08.06.2018, BINP, M.Kholopov

9. The stages of Assembly of the PANDA control Dewar: 3. Installation pipelines into the thermal shields of the control Dewar Figure 7. The stage 3. PANDA Collaboration Meeting 04-08.06.2018, BINP, M.Kholopov

10. The interface of the PANDA control Dewar. Connection place of the cryogenic system to move the PANDA detector. TL Bellows unit -Shift the bellows unit; -Combine the pipes in accordance with the flow scheme; -connect pipes; -Install super insulation; -Install the bellows unit in place; Connection joints Vacuum barrier Control Dewar PANDA Collaboration Meeting 04-08.06.2018, BINP, M.Kholopov

11. The interface of the PANDA control Dewar solenoid cryostat -Shift the bellows unit; -Combine the pipes in accordance with the flow scheme; -connect the superconductor busbars; -connect pipes by welding; -Install MLI super insulation covers; -Install the bellows unit in place. Control Dewar Chimney PANDA Collaboration Meeting 04-08.06.2018, BINP, M.Kholopov

12. The Chimney design: Bellows unit Chimney Flange ISO320RBR Thermal shield Flange ISO320RBR Spacer Pipelines Superconductor PANDA Collaboration Meeting 04-08.06.2018, BINP, M.Kholopov

13. The TL design: TL Metal Hoses DN20 Flange ISO250BF Metal Hoses DN200 Bellows unit -The end of the supplying TL has the ability to 3D move 300mm Flange ISO320RBR -The bellows unit has the ability to move 450 mm up PANDA Collaboration Meeting 04-08.06.2018, BINP, M.Kholopov

14. Thank you for your attention PANDA Collaboration Meeting 04-08.06.2018, BINP, M.Kholopov