D. Chen, Washimi, Akutsu

As entitled.

Details

As reported in 28322, MCe should be accessed also from its backside. So a K400 flange in the plus Y direction of MCE chamber should be detached. There is a very high quality window for IMC_TRANS on the K400 flange (Fig. 1). Before detaching the K400 flange, for safety, we detached this viewport window. Note that the window has a wedge, which should be installed in a proper direction; the marker at the flange in Fig. 2 indicated it. Then it was packed with softy material (this time I used vectra alpha) and also packed with aluminum foils, and then stocked it into a dessicator at the side of IMC (Fig. 3). The relevant screws used to fix this viewport were also packed and stocked in a metal shelf in the MCE clean booth (Fig. 4).

Then we detached the K400 flange, which have a maker to show the ceiling direction (Fig. 5),  and protected its flange and chamber's flange with white tapes (Fig. 6). And then protected with aluminum foils (Fig. 7).

The view from the opened flange is shown in Fig. 8. To access coil magnet actuators on MCe, the black shield should be also detached. So we will do it later.