13-Oct-14

Apr 20, 2023 S.Movchan Straw manufacturing and QC 1

Dubna modules assembly status (December 12 2013)

Straw manufacture:• CH4 M2 X-Y - 900 straws are ready• spare - about 300 pc

CH2 M2 X-Y status

CH4 M1 U-V status

CH4 M1 X-Y status

Presented by S.Movchan


Straws

Last straw serial number is #7032

900 straws for CH4 M2 X-Y (4-th Dubna module)# (5751-6700)

About 300 pс - spare: # (6701 - 7032 )


CH2 M2 X-Y status

Apr 20, 2023 4

CH2 M2 X-Y installed for assembly (July 16 2013)

Microworld physics, Gomel, 2013


CH2 M2 X-Y status: all straws glued(October 14 2013)

8 layers glued


CH2 M2 X-Y status: wiring finished(December 6 2013)


CH2 M2 X-Y: WEB reparation


Covers installation


Cells gas leak test by differential method

Cells (1+2)

Cells (3+4)

K= Cells (3+4)/ Cells (1+2)K=1

Gas leak:


CH2 M2 X-Y: plans

Tests:• cells gas leak test – in progress• HV test – in preparation

Final gas leak test – February 2014

Delivery to CERN – March -April 2014

“Dry” room for HV test


CH4 M1 U-V status


CH4 M1 U-V: vacuum test(October 2013)

Leak < 0.1 cm3/min(requirement L<=0.8 cm3/min)


CH4 M1 U-V installed for assembly (December 9 2013)


CH4 M1 U-V: straw gluing (January 27 2014)

V: 4 layers glued(January 24)

U: 3.5 layers glued(February 10)


CH4 M1 U-V: plans

Finish of straw gluing – February 14

V-coor. first gas leak test – February 12U-coor. first gas leak test – February 22 Wiring – end of February

Gas manifold installation - March 10

Final gas leak test – March 25

Delivery to CERN – March-April 2014


CH4 M2 X-Y


CH4 M2 X-Y: vacuum test preparation


Test result #7 (January 27 2014): zoom

Module P(mBar)

Module T(degree)

Atm P(mBar)

dP= 0.16 mBar, dT=4000 minTime scale: 3050-4050 min

dP= -1.2 mBar

dT= -1.2 degree


Test result #7, CH4 M2 X-Y vacuum leak estimation:

Leak estimation for final time interval dT=(3050-4050) min:

Time: dt = 4000 min (time scale: 3050 -> 4050 min)Room temperature: dT= - 0.25 degree (24.85 -> 24.6 degree) Atmospheric pressure: dP= -1.2 mBar (1018.8 -> 1017.6 mBar) Vacuum pressure drop: dP= 0.16 mBar (0 -> 0.16 mBar)

Vacuum pressure drop dP =0.16 mBar and dT=4000 min

Volume V=2.2x10**6 cm3

Gas leak estimation: L = dP/P * V/dT <= 0.09 cm3/min (Requirement: L ≤ 0.8 cm3/min)

OK!


CH4 M2 X-Y: schedule

Module frame gluing (January 2014) - done

Vacuum test (February 2014) - done

Straw gluing – March-April 2014

Wiring – May 2014

HV test – May 2014

Gas manifold installation – May-June 2014

Final gas leak test – June 2014

Delivery to CERN – end of June 2014

Apr 20, 2023 S.Movchan Straw manufacturing and QC

ConclusionStraw manufacture:

• 900 straws are for CH4 M2 X-Y • about 300 straws - spare

CH2 M1 U-V: • delivery to CERN – November 2 2013• HV test and gas leak test at CERN - done

CH2 M2 X-Y: • final tests (HV, gas leak) – February-March 2014• delivery to CERN – March-April 2014CH4 M1 U-V: - wiring – end of February 2014 - final gas leak test – March 25 2014 - delivery to CERN – March-April 2014

CH4 M2 X-Y:- straw gluing – March-April 2014- wiring - May 2014- final tests (HV, gas leak) – May-June 2014- delivery to CERN – end of June 2014

13-Oct-14

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