TCDD

Meeting of EM with Luca Bruno, Jean-Michel Fraigne, and AG on TCDD October 2005.

TCDD is a kind of collimator, whose goal is to protect the cold mass of the dipole, and it is downstream of the TDI. There are 2 TCDD, 1 in IR8 (it is a fixed mask here), and 1 in IR2 (it is a movable mask there for Alice).

Impedance + trapped modes? Their priority is for the fixed. AG proposed already to continue the pipe with the same diameter and then just have to make a transition between a rectangular and a circular shape. We thus avoid the trapped modes (by decreasing the radius of the pipe we increase the frequency of the trapped modes). We told them to make this tube in Cu with good contacts and that’s all. Next meeting on 07/11/05 to discuss results of simulations by AG.