Conclusions of Tracker Thermal Meeting at NLR, 19 march, 2002

J. Burger and M. Molina, 22.03.02

Present: J. Burger, C. Clark, M. Molina, A. Pauw, B. Verlaat, C. Vettore,
A. Woering, A. Delil (in part, by phone)

1) J. Burger will post A. Delil's presentation at MIT on the AMS thermal web site.
There was a misunderstanding caused by the wording of a summary slide presented
by J. Burger at the MIT TIM in January. The statement that the TTCS is a new type
of system with no backup was intended to mean that there was no
alternate solution, and was not intended to imply there is no redundancy.

2) The comparisons done so far were for a radiator mass of 18.5kg, area 1.63m2
per side. 
NLR will run the loop math model (for 3 cases) reducing the mass of the
radiator to 13.5 Kg: the output will be the heaters power needed and the set
point temperature. Due date: 27/3
In answer to the question brought up at the meeting:
The mass of the brackets which might be added to the radiator mass
are 5.5kg per side according to the presentation of M. Molina at MIT.

3) CGS delivers to NIKHEFF/NLR the nodal breakdown of the vacuum case: Due
date: 22/3

4) C. Vettore will be 3 days at NLR for building a preliminary  GMM and TMM
of the Tracker, with a more refined nodalizaton along the circumference.
Tentative dates:4-6 april or 8-10 april

5) CGS will re-generate interface data with the updated model. Tentative
date: End of April

6) NIKHEFF will deliver a detailed model. Tentative date: end of June

7) CGS will ask OHB an update about debris calculation results on the
tracker radiators. Curved radiator are now not needed for thermal reasons;
condenser parallel to the radiator panel can be accepted only if M/OD
analysis results are positive. Due date: end of March.

8) B. Verlaat will start to work on the two TTCS boxes. He and A. Woering will
give M. Capell, possibly next week, an estimate of the number of standard 
electronics cards needed, and the amount and kind of power for all TTCS 
electronics.