Revision as of 15:49, 7 November 2016

Cable routing decision

APA opening dimensions (usable): 44mm x 63 mm (constrained by foot opening -> Can it be larger?)

Actual dimensions: 70mm x 95mm (see below for drawings)

Drawings:

PD cables (Cat6): 9-10 mm diameter + PD head (xxmm x xxmm). 5 cables per APA -> 10 cables in upper APA

Cold cables: Max length = 25m (? real limitation?), 20 CE cable pairs per APA (can they be split for each side of APA frame? -> 10 CE cable pairs per tube?)

Dimensions: 7m wide x 6m high

How difficult is it to bring the cables up in the APA frame? How long are the cables? What type of access we need to pass the cables through?

Are there any mechanical difficulties to pass the cables up the APA frame? Weight? Space?

Grounding and Shiedling: Can we bundle the cables together? Do we need mechanical/electrical separations in the APA frame?

If we go along the cryostat wall, we need longer cables. What is the impact of longer cables on readout? Procurement?

Is there anyway we can attached the cables on the cryostat wall? At the moment there is no mechanical device on the inner cryostat membrane. The space between APA and membrane is ~15cm. Need to take the weight of the cables into account in this design solution.

@@ Line 23: / Line 23: @@
 * '''PD cables''' (Cat6):  9-10 mm diameter  + PD head (xxmm x xxmm). 5 cables per APA -> 10 cables in upper APA
-* '''Cold cables''': Max length = 25m (? real limitation?), 20 CE per APA (can they be split for each side of APA frame? -> 10 CE cables per tube?)
+* '''Cold cables''': Max length = 25m (? real limitation?), 20 CE cable pairs per APA (can they be split for each side of APA frame? -> 10 CE cable pairs per tube?)
 ===Cable routing plan for protoDUNE ===