RoentDek DLD120, Manual

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MCP Delay Line (Version 6.2.90.5) Page 19 of 80
Mount the stainless steel support ring with the 4 threaded bolts to the delay-line anode (see Figure 2.24). You can may use
one of these thread bolts to supply the anode holder voltage with an appropriate cable. Mount the support ring with 8
ceramic insulators and 8 nuts on the M3 threaded bolts on the flange. Adjust everything parallel to the flange and fix the nuts.
Please note that the ceramic insulators will not tolerate excessive force when fixing the nuts.
Figure 2.25: Sketch of the detector (flange mounting option)
2.4.5 Connecting the Signal Cables to the Feedtrough Flange
Unless you have purchased the flange mounted option you will usually receive a spool of Kapton isolated cables which can be
used in UHV. You need to produce single and twisted-pair cables of sufficient lengths as described before in this section. The
cables should only be as long as necessary. Especially the quality (amount of “ringing”) of the MCP signal is usually better if
the connection cable is very short.
For the
DLD connect all 8 signal cables from the delay-line and the other 3 or 4 high voltage cables (MCP front, MCP back,
anode holder plate and optional mesh) from the vacuum side of the feedthrough flange. Figure 2.26 shows the flange from
the vacuum side.
Pin number Function ART19 channel TDC Channel FT12-TP
FT12 flange channel HM1 / TDC8
No. 1 X (e.g.Mesh)
No. 2 MCP front No. 1 No. 1 or No. 2 “start”/common
No. 3 MCP back No. 2 No. 1 or No. 2 “start”/common
No. 4 Anode Holder
No. 5 x
1
-signal No. 3 No. 3 x1 / 1
No. 6 x
2
-reference (No. 4) (No. 4)
No. 7 x
2
-signal No. 4 No. 4 x2 / 2
No. 8 x
1
-reference (No. 3) (No. 3)
No. 9 y
1
-signal No. 5 No. 5 y1 / 3
No. 10 y
1
-reference (No. 5) (No. 5)
No. 11 y
2
-signal No. 6 No. 6 y2 / 4
No. 12 y
2
-reference (No. 6) (No. 6)
Table 2.1: FT12-TP pin description for DLD detectors