Radiation test wedges

One wedge is taped to the nosecone, and one is taped to a block of polyethylene plastic, 3" wide, 2" thick, ~8" long. The positioning of the block is as close to the beam pipe as possible, given the contraints of where existing mounting holes were, and that we could not use just tape to hold it in place, and the rules goveerning the area close to the beam pipe. The square area milled out of the brass is 8.0", and the tip of the wedge is just a few mm further out, so the tips of the wedges are at ~10.6 cm.

The wedge taped to the brass is placed such that the tip is at the same radial distance as the other one, and pointing to the beam pipe. This envelope also holds a TLD, taped to the approximate cented of the wedge. A TLD from the same batch (dated 2006) is kept in 510.

Wedges were mounted Wednesday 14 March 2012 at about 16:00, and dismounted 20 Mar 2012, about 08:00.

Similar photos taken just before removal: DSCN4706.JPG, DSCN4707.JPG DSCN4708.JPG

Some dimensiona are shown, here is a drawing of the nosecone area



Some more pictures: DSCN4712.JPG, DSCN4713.JPG
Leakage currents before and after exposure in the IR. Measurements taken at room temperature, 24°C.



References to the radiation issue: More links:
Hubert Van Hecke
Last modified: Tue Mar 20 13:43:18 MDT 2012