**[\-\-- Construction Procedures for Aerogel South-side 80 boxes
\-\--]{.mark}**

(May/05/2004, M.Konno)

[]{.mark}

**[1. Parts Information]{.mark}**

[1-1 Parts List]{.mark}

<http://www.phenix.bnl.gov/WWW/upgrades/highpt/parts-list/parts-list.html>

[1-2 Aerogel Tiles (North-side 80 boxes)]{.mark}

<http://www.phenix.bnl.gov/WWW/upgrades/highpt/parts-list/Aerogel/aerogel.html>

[1-3 Items To Be Prepared (as of Mar/23/2004)]{.mark}

(1) Aerogel tiles

-Additional tiles will be delivered to BNL by mid-May

-Measurement of size and refractive index

-Measurement of size and refractive index

\(1\) PMT (R6233-01HA); x 4\
(2)+ Gas connector (T-shape); 77\
(3)+ Gas tube (1/2\", 1/4\")\
(4)+ Kapton tape (1\"wide, 3mil thick); 670 feet\
(5)+ Kapton tape (1\"wide, 6mil thick); 670 feet\
(6)+ Teflon tape (ones we used); 26 rolls\
(7)+ HV connector (LeCroy-side), strain relief; 16sets\
(8)+ AMP contact pins of connectors (HV, SIG, LED); 200 each\
(9) LED Driver; 1\
(10) LED Divider; 2

\(11\) HV Module; 8

**[2. Construction procedure (South-side 80 cells)]{.mark}**

[2-0 Time Schedule and Manpower]{.mark}

-Will be started in April

-   

-2-3 grad students

-Help of technicians

-It takes 1\~2 months.

[2-1 Mechanical Box Assembling (High-Bay)]{.mark} \<- [Total: 3 \~ 4
week/80boxes/3person]{.mark}

[2-1-1 Inner Box Assembling]{.mark} \<- [1\~1.5 hour/Box/person]{.mark}

\(1\) Fold Mylar sheet to make folding lines in advance

\(2\)

Get together with Goretex reflector sheet by using double-sided tape and
staple (Also using plastic Inner-Inner Box for supporting the inner box)

\(3\) Punch single hole for LED

\(4\) Loading aerogel tiles into Inner Box (Careful handling required)
-- 22 tiles

\(5\) Stretch and Fix two Goretex-straps on the surface of aerogel
volume

\(6\) Close inner box

![](media/image1.png){width="2.5416666666666665in"
height="2.0208333333333335in"}

[2-1-2 PMT Assembling]{.mark} (\* see below) \<- [\~1
hour/PMT/person]{.mark}

\(1\) Cut the corner of the PC-Board to avoid contact with Gas connector

\(2\) HV Isolation treatment

\(3\) Mechanical assembling (PMT, PMT-base, Mu-metal, PMT holder))

[2-1-3 Lid Assembling]{.mark} (\* see below) \<- [2 hour/Lid/person + 1
night for drying]{.mark}

\(0\) Cut the projections of connectors

\(1\) Assemble the following parts:

> Al-lid, Lid handle, PMT holder, PC-board (hole, tap for gas
> connectors), Black paper (Punch through hole with screw), Spacer
> (black delrin), Connectors (HV, SIG., LED),

Epoxy (DP-270).

\(2\) Twisted pair cable for LED input line to isolate the LED ground,

\(3\) LED (with 100-ohm resistor, support rubber tube),

\(4\) Solder cables (HV, Signal) on the connectors inside PC-Board

\(5\) Lid + PMT + Band

\(6\) Solder cables (HV, SIG) btw connectors and PMT-base,

\(7\) Test: (a) Electrical connection (HV pins; \~7 M-ohm, Sig pins;
\~200 k-ohm),

\(b\) LED emitting

![](media/image2.jpeg){width="2.5in" height="1.875in"}

![](media/image4.png){width="2.5in" height="1.8555555555555556in"}

[2-1-4 Box Assembling]{.mark} (\* see below) \<- [\~0.5
hour/box/person]{.mark}

\(1\) Box blanket with black tape

\(2\) Lid + Inner box + Al-Box

\(3\) Clean up (remove dust with air spray)

![](media/image6.png){width="2.6145833333333335in"
height="1.9895833333333333in"}

**\* HV isolation treatment** \<- [1\~1.5 hour/PMT/person]{.mark}

Case:

-Spark btw. PMT, mu-metal shield, box.

-Surface leak of the HV at the non-coating circuit board.

Solution:

\(1\) Kapton, Teflon tape btw cathode and mu-metal

\(2\) Mylar sheets btw mu-metal and box

\(3\) Kapton tape btw bleeder and box

\(4\) Remove with ethanol

\(5\) (After cleaning,) RTV (RTV162) around input line

Course:

-Single rate at --1.5 kV: \< a few kHz

-Coincidence rate of 2 PMTs: a few \~ a few tens Hz

-Leakage voltage: \<1 V

-Conductance at HV input line: \<0.1 nS

![](media/image7.png){width="2.5in" height="1.9791666666666667in"}

[2-2 Light / Gas Shielding and Test]{.mark} \<- [1\~2 hour/Box/person +
1\~2 days]{.mark}

\(1\) Taping (a)btw frame piece and box, (b)btw lid and box.

\(2\) Gas connectors -- connector direction; up-down (odd), down-up
(even)

\(3\) Epoxy (one night to be solid) around screws and gas connectors.

\(4\) Light shield test

(by scope, if necessary, epoxy glue is pasted on the light leak points.)

\(5\) Box potential, Noise rate (single, coincidence)

\(6\) PMT Gain w. LED

\(7\) Long-term (1\~2 days) HV applying

[2-3 HV Cable Assembling (8 sets):]{.mark} \<- [1
week/8sets/person]{.mark}

<http://www.phenix.bnl.gov/phenix/WWW/upgrades/highpt/2003/construction/>

hv_south_assm_1.ppt

hv_south_note.ppt

[2-4 Integration]{.mark} [(Oct/9-12/2003)]{.mark}

\(1\) L-angle for the lid to be prevented from falling down by external
forces

\(2\) Gas manifold mounting

\(3\) 80 boxes (south side) stacking

\(4\) Gas tubing (N2)

\(5\) Preamp mounting (20 preamps for 80 boxes)

\(6\) Cabling (HV x6, Signal (PMT to Preamp) x160, LED x20)

\(7\) Box safety ground braid

GND = (I) HV&Sig. GND, (II-a) LED GND, (II-b) Box GND

\(8\) Stop (preventing from swinging) is needed even at Bldg.510

![](media/image8.jpeg){width="2.15625in" height="2.875in"}

![](media/image9.jpeg){width="2.875in" height="2.15625in"}

[2-5 Test of Readout]{.mark} \<- [2 day/80boxes]{.mark}

-Actual Cable Lines (HV, SIG, LED)

-Connection test

-Light leak check - Inspection and Repair as Necessary

![](media/image10.jpeg){width="3.0in" height="2.252083333333333in"}

[2-6 LED Driver Pre-Setting]{.mark} \<- [2 day/80boxes]{.mark}

-Variable resistance setting for LED intensity

-Pedestal shift (\~2 ch) \<- Known problem

[2-7 Gas Flow Test]{.mark} \<- [1 day/80boxes]{.mark}

-N2 flow

In: \~1.1atm, \~0.25liter/min/box

Out: 0.01 inch H2O, \<0.025 liter/min/box (depending on the box)

-Test results of North-side as reference:

<http://www.phenix.bnl.gov/phenix/WWW/upgrades/highpt/2003/construction/>

GasFlowTest_26Oct2003.pdf

[2-8 Survey at High-Bay]{.mark} [(Oct/27/2003, Surveyors)]{.mark}

[2-9 Preparation for transport]{.mark}

\(1\) Temporary supporting bar for cables

\(2\) 2 wooden stoppers at the bottom for transportation

**Construction complete** [(Oct/30/2003)]{.mark}

[2-10 Transport to Experimental Hall (bldg. 1008)]{.mark}
[(Nov/3/2003)]{.mark}

![](media/image11.jpeg){width="1.9534722222222223in"
height="2.6041666666666665in"}[2-11 Installation at W1]{.mark}
[(Nov/4/2003)]{.mark}

![](media/image12.jpeg){width="2.75in" height="2.0631944444444446in"}

[2-12 Survey]{.mark} (Surveyors)

-6-inch lift up

-Survey by surveyors

[2-13 Cabling]{.mark}

-HV x6

-Signal (preamp to FEM) x20

-Power (preamp) x20

-LED x20

-Gas tube

-N2 Ventilation System (South side)

[2-14 Power Supply and Readout Module]{.mark}

-Racks -- Water-cooling

-Power -- HV, Preamp, FEM, LED, NIM crates.

-FEM (5-readout + 1-controller + 1-communication boards)

-FEM Test by using Crate, DCM, GTM.

-HV modules (x9) -- GND fluctuation (+/- 3mV, \~0.1MHz) known

-LED Driver (x2)

-DCM, GTM

-Readout test through fiber and DCM

[2-15 Signal Check and HV setting]{.mark}

\(1\) LED Calibration system (Cable, Pulse Generator, LED Driver, LED
Divider)

\(2\) Signal Check with LED (160ch)

\(3\) HV setting (\~6 x 10\^6)

[2-16 Documentations]{.mark}

-Operational Procedure

-Instruction Manuals

(END)