Cryo Capture Cavity II Progress

1
Cryo Capture Cavity II Progress

• Mike McGee
• April 13, 2005

2
Status at Fermilab

• Modifying helium vessel clamp design to
  accommodate type III helium vessel

• Designing shipping/installation fixture

• Designing helium return pipe reducer and flanged
  connection

• Preparing for dry fit of assembly into vacuum
  vessel

• Ordering stainless steel materials for
  transitions, spool and fixture

• Preparing overall assembly procedure for Cryo
  Capture Cavity II during various stages

3
Comparison of helium vessels

• Providing clearance for helium vessel tabs (4)

• Providing clearance for return pipe feed from
  helium vessel

4
Modified helium vessel clamp

• Modification areas are shown in red (note return
  pipe is actually rotated 45 degrees)

5
Openings for helium vessel clamps

• 4 openings in magnetic shielding per helium
  vessel clamp

• Will provide DESY with shielding drawing of
  opening placement by Thursday

6
Magnetic shield opening detail

• 4 screw cut-outs and 4 pad cut-outs

7
Modify 80K shield

• Horizontal orientation for both valves

• Cut holes in 80K shield

8
Modify VAT valve

• Machine off hex head and cut square (for use with
  ratchet extension) on VAT valve spindles

9
Existing Tuner

• Stepper motor interferes with bottom of US VAT
  valve

• Use of mirrored DESY tuner

10
Dry fit at Fermilab

• Assemble transitions and pseudo VAT valve spools
  with existing cavity on installation fixture

11
Dry fit at Fermilab

• Insert assembly into vacuum vessel off horizontal
  axis

12
Dry fit at Fermilab
13
Low radial profile end flange design
14
Assembly for DESY

• Send to DESY (May 2005)

• Cleaned US and DS warm-to-cold transitions and
  spool

blank flange

• Under argon positive pressure

valve w/filter
15
Assembly for DESY with fixture

• Assembly sent to DESY in crate with shipping
  fixture

16
VAT valve support
17
Assembly shipped from DESY

• Assembly

• Cavity and helium vessel

• Spool between VAT valve and cavity

• Mirrored tuner

• Magnetic shield

• Input coupler

• US DS Warm-to-cold transitions and spool

18
Install cavity assembly into vacuum vessel

• Use of monorail with end supports

• Insert off horizontal axis

19
DS warm-to-cold transition
20
US warm-to-cold transition
21
Shipping fixture baseline vibration study
en-route from DESY

• We need baseline information of overseas shipping
  for Capture Cavity II and other devices

• Media Recovery Shock-Log

• Provides acceleration measure in x, y and z

• Custom software provided is Windows compatible
  for use with laptop

22
Shock-Log Use

• Features ability to optimize sample rate based on
  trip duration

• Also features a wake-up threshold if a specified
  acceleration is exceeded

• US Customs, Air Carriers and Homeland Security
  are more likely to allowable a commercial device
  rather than one homemade

• Checking on acceptance by US Customs and Homeland
  Security

• Cost of device with software 2,400

23
Schedule