minutes videoconference 9.Nov.2004

present: H.Kirk, K.McDonald, Y.Ivanyushenkov, P.Titus, P.Spampinato, F.Haug, H.Haseroth, A.Fabich

presentation FH:

• The LN2 bath for cooling the solenoid to 82 K is at a temperature of about 77 to 78 K.
• initial flush is directly with LN2, possible using warm N2 first.
• because of the vacuum jackets a small vacuum pump is required in the system. could also be used for purging.
• NO electrical or passive heater will be integrated in the system.
• dewar is a storage device and should not be used as a phase separator.
• LN2 piping
  • flexible: from dewar to DVB
  • rigid or flexible: DVB to cryostat and back
  • flexible: DVB to exhaust
• valves V1 to V5 are remotely controlled. V1 is for free as integrated in dewar.
• to make the cryogenic lines as short as possible, FH requests hole in wall from TT2 to TT2A. Is this feasible.
• FH is in contact with T.Otto for an estimate, whether small amounts of activated LN2 spilled to the surface are an issue.
• low point (trap) required in transfer line to minimize activated LN2
• KMcD asked detailed drawing/operation of LN2 dewar

presentation YI:

presentation AF:

• The dedicated PS MDs are only useable for removal, whereas a PS MD without extraction is very unlikely.
• The extended dump wall left of D3 could be either a chicane or moveable