1. Structure and etc Shoji Uno (KEK) 2012.7.23 at B2GM

2. Outer CFRP cylinder New bidding was successfully performed in April.
The cylinder will be delivered by the end of September.
Connection with endplates will be done in other company.
Then, it will transferred to KEK in October.

3. Fabrication of structure
Done
In 2012
In 2013

4. Wire stringing place : Fuji B4
Now
March

5. Clean room Main room 8m×5m Side room 8m×3m Empty space, now
Desk and shelf are available,
already.
Roof can be removed.

6. Frame & Stage for Wire Stringing
Designed by Koriki
Designed by Enami & Yoshida
(KEK machine shop)

7. Preparation of wire stringing 1
30um Au-W : 60km > 45km (3mx15000)
120um Al : 10kg > 4.6kg (34mgx3mx45000)　　
Feedthrough
Length
Necessary
Stocked
Sense 45
3200
4000 35
2240
2800 20
23232
29500
Field
5376
6720
2560
68864
71349
Pin of field wire
for the small cell chamber
7680
10000

8. Preparation of wire stringing 2
Crimper
Manual crimper : Ready
Air crimper : Ready
Special crimper for field wire of small cell chamber : Need to check
Pre-tension bar
Need to buy

9. Test for tension measurement
Search for resonant frequency
using magnetic field
Sense wire 30mm W
Field wire 126mm W
50Hz noise
Basic resonance
Basic resonance

10. Wire expansion
Aluminum field wire can expand proportionally up to 180 g (80 g :used weight).
After that, the expansion becomes large dramatically without breaking.
It is quite important feature, to replace bad wires.
Measured by N. Taniguchi
ΔL = 3mm
at Tension = 80g and L = 1.5m

11. Thailand people
One stuff and one student stayed in KEK for 1 month each after the last B2GM.
They measured the temperature dependence of the base line of ASIC analog output and temperature of various chips on the 48ch readout board.
Those are useful for us to finalize the 48ch readout board.

12. Baseline shift vs Temperature
Baseline Voltage (V)
V(30degree) – V(20degree)
Temperature (degree)

13. Room temp oC
Not connect to the chamber
44.8
41.2
46.8
38.2
45.2
46.2
44.2
40.0
41.4
47.2
41.4
37.2
47.2
46.0
41.6
48.2
39.8
41.6
39.4
39.8
41.6
30.2
39.8
43.2
43.2
43.2
44.2
41.8
30.4
37.0
41.4
37.4
39.2
35.8
38.4

14. Room temp oC
40.0
41.2
44.0
41.8
35.2
42.8
40.8
40.6
33.6
50.6
45.4
35.8
45.4
40.2
41.2
34.8
35.2
40.6
41.8
40.0
41.4
42.6
31.2
40.8
42.6
42.4
41.2
39.4
32.4
30.8
39.2
40.2
39.6
38.8
36.3
30.7
Connect to the chamber

20. Revised construction schedule
BPAC by Ushiroda
JFY
2010
2011
2012
2013
2014
2015
Items I II
III IV
Fixing outer radious
2010/06/01
Wire configuration design
2010/6/1-2010/6/30
Endplate design
2010/6/1-2010/11/30
Bidding of structure
2010/12/20
Endplate machining
2011/1/1-2011/3/31
Drilling
2011/4/1-2012/5/31
Assembling of Endplates
2012/9/1-2012/9/30
Wire stringing
2012/10/1-2013/12/31
Making small cell chamber
2013/5/1-2013/12/31
Insertion of small cell chamber
2014/1/1-2014/1/10
Tension measurement
2014/1/ /2/28
Gas leak test
2014/3/1-2014/6/30
HV cabling
2014/7/1-2014/7/10
HV test
2014/7/ /10/30
Signal cabling
2014/11/1-2014/11/30
Readout board R&D
2009/04/ /3/31
Readout board mass production
2013/6/1-2014/9/30
Preamp + Cooling water
2014/12/1-2014/12/31
Cosmic ray Test at clean room
2015/1/1-2015/4/30
Installation of CDC & Test
2015/5/1-2015/6/30
Cosmic ray test on 1.5Tesla
2015/8/1-2015/9/30

21. 2012BPAC report

23. Backup

24. Clean room
Will be constructed by the end of March

25. Temporal connections of endplates
Backward
Forward
Small cell part
Small cell part
Conical part
Main part
Conical part
Connections are very smooth using several 3mm bolts into 3.2mm holes.
Accuracy check will be performed in next fiscal year after finishing treatment and cleaning.
Conical part
Main part