Target Chamber Swaps: Difference between revisions
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(Created page with "During the recent switch from the Spieker chamber to the original Yale chamber, there was some basic confusion about how to re-install the Yale chamber. Most involved agreed that it would be useful to develop a checklist for chamber swaps. I offer the following notes as a starting place for this and other procedures associated w/ the SPS. == Target Chamber Swaps == === Spieker Chamber -> Yale Chamber === The following notes are lessons learned (or more accurately re-l...") |
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During the recent switch from the Spieker chamber to the original Yale chamber, there was some basic confusion about how to re-install the Yale chamber. Most involved agreed that it would be useful to develop a checklist for chamber swaps | During the recent switch from the Spieker chamber to the original Yale chamber, there was some basic confusion about how to re-install the Yale chamber. Most involved agreed that it would be useful to develop a checklist for chamber swaps. | ||
== Spieker Chamber -> Yale Chamber == | |||
The following notes are lessons learned (or more accurately re-learned) during the recent chamber swap. | The following notes are lessons learned (or more accurately re-learned) during the recent chamber swap. | ||
# The overhead gantry cranes can not center over the target chamber. In the past we have slung a 1 ton chain hoist over the gantry crane bridge as close to center as possible. It is not perfect and two people are required to control the chamber during hoisting operations. | # The overhead gantry cranes can not center over the target chamber. In the past we have slung a 1 ton chain hoist over the gantry crane bridge as close to center as possible. It is not perfect and two people are required to control the chamber during hoisting operations. | ||
# The clamp ring bolts that hold the chamber down to the trunnion at the bottom are metric M8 - 1.25 x 25mm. | # The clamp ring bolts that hold the chamber down to the trunnion at the bottom are socket head cap screws, metric M8 - 1.25 x 25mm. | ||
# A guide screw was installed that locates the chamber in the correct orientation w.r.t. the trunnion. This screw should be raised and used to guide the Yale chamber into location. I believe the pin enters the section of the chamber that rotates w/ the trunnion, but this should be confirmed before leaving the pin engaged. | # A guide screw was installed that locates the chamber in the correct orientation w.r.t. the trunnion. This screw should be raised and used to guide the Yale chamber into location. I believe the pin enters the section of the chamber that rotates w/ the trunnion, but this should be confirmed before leaving the pin engaged. | ||
# There are 4 | # There are 4 socket head cap screws, 5/8" - 11 x 2" that mount from the under side that fix the stationary portion of the chamber w/ the inner trunnion carriage. This is tied down w/ the tie rod. Omission of these bolts will allow the beam inlet pipe to shear the beamline apart on rotation. | ||
# The sliding seal had to be exercised ~ 30 degrees before it would seal after storage. | # The sliding seal had to be exercised ~ 30 degrees before it would seal after storage. | ||
# If the cryo is not installed, the bottom of the chamber is sealed with a nominal 6" (11" O.D.) flange and a 2-266 o-ring. This is bolted with 3/4" - 10 x 1.5" | # If the cryo is not installed, the bottom of the chamber is sealed with a nominal 6" (11" O.D.) standard ASA flange and a 2-266 o-ring. This is bolted with hex head cap screws, 3/4" - 10 x 1.5". | ||
Additionally, a cart needs to be created that will hold either of the offline chambers and all of the associated parts and allow safe transport AND storage. | Additionally, a cart needs to be created that will hold either of the offline chambers and all of the associated parts and allow safe transport AND storage. | ||
== Yale Chamber -> Spieker Chamber == | |||
Latest revision as of 09:24, 9 December 2022
During the recent switch from the Spieker chamber to the original Yale chamber, there was some basic confusion about how to re-install the Yale chamber. Most involved agreed that it would be useful to develop a checklist for chamber swaps.
Spieker Chamber -> Yale Chamber
The following notes are lessons learned (or more accurately re-learned) during the recent chamber swap.
- The overhead gantry cranes can not center over the target chamber. In the past we have slung a 1 ton chain hoist over the gantry crane bridge as close to center as possible. It is not perfect and two people are required to control the chamber during hoisting operations.
- The clamp ring bolts that hold the chamber down to the trunnion at the bottom are socket head cap screws, metric M8 - 1.25 x 25mm.
- A guide screw was installed that locates the chamber in the correct orientation w.r.t. the trunnion. This screw should be raised and used to guide the Yale chamber into location. I believe the pin enters the section of the chamber that rotates w/ the trunnion, but this should be confirmed before leaving the pin engaged.
- There are 4 socket head cap screws, 5/8" - 11 x 2" that mount from the under side that fix the stationary portion of the chamber w/ the inner trunnion carriage. This is tied down w/ the tie rod. Omission of these bolts will allow the beam inlet pipe to shear the beamline apart on rotation.
- The sliding seal had to be exercised ~ 30 degrees before it would seal after storage.
- If the cryo is not installed, the bottom of the chamber is sealed with a nominal 6" (11" O.D.) standard ASA flange and a 2-266 o-ring. This is bolted with hex head cap screws, 3/4" - 10 x 1.5".
Additionally, a cart needs to be created that will hold either of the offline chambers and all of the associated parts and allow safe transport AND storage.