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19th – 20th of September 2007Cryogenic Expert Meeting at GSI, Jan Patrick Meier1/11 Cryogenic Experts Meeting at GSI, 2007 The SIS 100 Cryogenic Jumper.

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Presentation on theme: "19th – 20th of September 2007Cryogenic Expert Meeting at GSI, Jan Patrick Meier1/11 Cryogenic Experts Meeting at GSI, 2007 The SIS 100 Cryogenic Jumper."— Presentation transcript:

1 19th – 20th of September 2007Cryogenic Expert Meeting at GSI, Jan Patrick Meier1/11 Cryogenic Experts Meeting at GSI, 2007 The SIS 100 Cryogenic Jumper Line Development Overview on the SIS 100 Cryostat Structure Construction Space Standard Situation Exceptional Situation Conceptual Layout Tubing Layout Cryostat Layout Bus Bar Layout Contraction Compensation Tubing Compensation

2 19th – 20th of September 2007Cryogenic Expert Meeting at GSI, Jan Patrick Meier2/11 S1 Transfer S2 S3 S4 S5 Extraction S6 Injection Overview on the SIS 100 Cryostat Structure The global cryostats structure in the SIS 100 ring warm and cold ring sections are connected by Cold Warm Transitions (CWT's) straight sections with warm parts of the beam line has to be bridged by Cryogenic Jumper Lines

3 19th – 20th of September 2007Cryogenic Expert Meeting at GSI, Jan Patrick Meier3/11 The cryostat structure in the straight section warm and cold ring sections are connected by Cold Warm Transitions (CWT's) straight sections with warm parts of the beam line has to be bridged by Cryogenic Jumper Lines 12,9 m 51,6 m Overview on the SIS 100 Cryostat Structure

4 19th – 20th of September 2007Cryogenic Expert Meeting at GSI, Jan Patrick Meier4/11 2 m  1 m  400 Construction Space: Standard Situation Top view on one straight ring section representing the standard situation in 5 of 6 arcs Cabling Bridge m  1 m  Cabling bridges are located on the ring tunnel walls. Thus the pass width behind the Jumper line is reduced to 300 mm. Question: What is the minimum space requirement for assembling and maintenance work on the Jumper Line between Jumper Line and other devices.

5 19th – 20th of September 2007Cryogenic Expert Meeting at GSI, Jan Patrick Meier5/11 Construction Space: Exceptional Situation Top view on one straight ring section representing the exceptional situation in 1 of 6 arcs Due to the introduction of additional transfer kickers in the missing dipole gap in the transfer arc this arc cryostat is interrupted by a warm section. The Jumper Line has to be extended in upstream direction by one more branch. Thus a bend following the arc appears in the line.

6 19th – 20th of September 2007Cryogenic Expert Meeting at GSI, Jan Patrick Meier6/11 Structure of SIS 100 Jumper Line straigth sections with warm parts of the beamline has to be bridged by Cryogenic Jumper Lines The Jumper Line feeds Cryogenic Supplies and Bus Bars from the end of an arc cryostat to the straight section cryostats and towards the next arc cryostat. Conceptual Layout: Tubing Layout Warm sections in the ring Bus Bar 1 Phase LHe - 4.5K 2 Phase He - 4.5K 50K GHe - Line 80K GHe – Line Thermal Shield Support Structure Vacuum Tube Crossection of Tubing and Bus Bar Layout General 2 Phase Line level in SIS100 Ring Question: Is a close contact between MLI and GHe enough for eficient shield cooling? Question: Are there known cases where heat condution in the support structure turned out to be critical?

7 19th – 20th of September 2007Cryogenic Expert Meeting at GSI, Jan Patrick Meier7/11 Conceptual Layout: Tubing Layout 2 more Branch Lines in the final Ring Version End of Arc CryostatBegin of Arc CryostatQP Cryostat (3 x for the final Ring Verison) Terminal Flange at Feedout Terminal Flange at Feedin A Cool Down Braid reduces the cool down time of the cold masses. 1 and 2 Phase He – 4.5 K in the Branch Lines have got a reduced cross section of approximately  10 mm ( ). Question: Are there well proofed concepts for the coolant transfer between cryogenic tubing and bus bars of the Nuclotron type in Jumper Lines? ? Distances for Model Type are not clear yet. Question: Which is the minimum length for a 2 Phase He Line to investigate the 2 Phase flow behaviour (? Cryogenic Structure of the SIS 100 Jumper Line in the Ring Cryogenic Structure of the SIS 100 Jumper Line in the Ring 1 Phase LHe - 4.5K  38 2 Phase He - 4.5K  K GHe – Line NW40 80K GHe – Line NW40 Cool down Braid Vacuum TubeNW400

8 19th – 20th of September 2007Cryogenic Expert Meeting at GSI, Jan Patrick Meier8/11 Cryogenic Structure of the SIS 100 Jumper Line in the Ring 1 Phase LHe - 4.5K 2 Phase He - 4.5K 50K GHe - Line 80K GHe – Line Thermal Shield Vacuum Tube Conceptual Layout: Tubing Layout Connection Flanges with Sliding Muff Quadrupole Cryostat at the end of an Arc Cryostat Beam direction Due to the requirement that the 2 Phase He - Line needs to be routed always on the same horizontal level the Feed Out flange is located mostly under the beam level. To avoid sharp bending angles the Feedout leaves the Cryostat under an angle < 90°. The Feedout leaves the cryostat at the position of the last Quadrupole to keep the possibility of a close supply. Question: What are the experiences with the behaviour of 2 Phase He flows in bended tubing? CWT

9 19th – 20th of September 2007Cryogenic Expert Meeting at GSI, Jan Patrick Meier9/11 Conceptual Layout: Cryostat Layout 1 Phase LHe - 4.5K 2 Phase He - 4.5K 50K GHe - Line 80K GHe – Line Bus Bars Thermal Shield Vacuum Tube 1 m Sliding Muffs for assembling and maintenance work Feedin Port Feedout Port Branch Port Fixed Support Sliding Support Mechanical Structure of the SIS 100 Jumper Line Testing Model Assembly space near all ports is accessible via sliding muffs. Long distance tubes will be splitted in parts short enough to handle in the tunnel. Bus Bars and Tubing is supported by fixed and sliding supports each 1 meter. Question: What are optimal positions for a fixed and sliding supports? Question: What is the better connection concept for sliding muffs? Bolted and rubber sealed connection or welded connection? Question: What is the better concept for a sliding support? Tubing sliding in fixed support or Tubing fixed in sliding support? Question: What are optimal length of com- ponents for the installation in the Ring tunnel?

10 19th – 20th of September 2007Cryogenic Expert Meeting at GSI, Jan Patrick Meier10/11 Conceptual Layout: Bus Bar Layout Electrical Structure of the SIS 100 Jumper Line Testing Model Bus Bar Interconnection Vacuum System Current Lead All Bus Bars are routed paired, selected by counter wise currents. For testing purposes all Bus Bars are in series. Question: Are there well proofed concepts for the coolant transfer between cryogenic tubing and bus bars of the Nuclotron type in Jumper Lines? The Jumper Line Model shall be operated with End Boxes simulating Magnet Cryostats.

11 19th – 20th of September 2007Cryogenic Expert Meeting at GSI, Jan Patrick Meier11/11 Contraction Compensation: Tubing Compensation Pressure forces Counter force Concept for compensation of length contraction The standard concept for compensation of length contraction is the use of compensation bellows. Introduced pressure forces have to be compensated. To reduce the risk of turbulences in the 2 Phase Flow an inner tube might be applied in the compensation bellows Question: Under which conditions would an inner tube be necessary? Question: What is the necessary assembling space around compensation bellows?


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