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MicroPot Revisited. Work in Progress Jaak Lippmaa Helsinki Group, Helsinki Institute of Physics, University of Helsinki Manchester, December 12, 2005. The Revelation. So, it is back to the. Detectors are not supposed to be in the primary beam vacuum

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Micropot revisited

MicroPot Revisited

Work in Progress

Jaak Lippmaa

Helsinki Group, Helsinki Institute of Physics, University of Helsinki

Manchester, December 12, 2005


The Revelation

Manchester 11-13 Dec 2005 MicroPot Revisited Jaak Lippmaa


So it is back to the
So, it is back to the ...

  • Detectors are not supposed to be in the primary beam vacuum

  • Access to detectors and/or positioning mechanics is preferable

  • Access mechanics should NOT complicate the re-design of the transfer cryostate

Manchester 11-13 Dec 2005 MicroPot Revisited Jaak Lippmaa


Considering
Considering...

  • The protons are in the pipe facing the wall

  • And no access ”SAS” is possible through the QRL

  • And ”Dimples” are not allowed on the heavy traffic side of the transfer cryostate

  • And we really really do NOT want to delve into Kelvin temperature detectors

Manchester 11-13 Dec 2005 MicroPot Revisited Jaak Lippmaa


We have to
We have to...

  • After a meeting last night with Keith, Daniela, Andrew, Krzysztof and myself...

  • Modify (if only slightly) the Micropot of yesterday

  • So, if we do some simple trigonometry

  • And take the vertical dimension of the detector at the beam pipe centre equal to 8mm

  • We actually have 80mm available for the other dimension where we only need 24mm

Manchester 11-13 Dec 2005 MicroPot Revisited Jaak Lippmaa


Get oriented
Get oriented...

The Wall

Manchester 11-13 Dec 2005 MicroPot Revisited Jaak Lippmaa


Which means that what if we
Which means that, what if we...

Take the transfer

Cryostate, and...

Put a tube here...

And weld it here...

And here...

And put a flange here...

WE WOULD GET...

Manchester 11-13 Dec 2005 MicroPot Revisited Jaak Lippmaa


We would get a pot indeed
We would get a POT indeed

  • Which retains Primary, Secondary, Tertiary and other vacuum enclosures

  • Keeps detectors separated from the beam vacuum

  • Puts detectors on the same side as the actuator (NB! Both are removable)

  • Seals everything off with a vacuum shield

  • Has a service port

Manchester 11-13 Dec 2005 MicroPot Revisited Jaak Lippmaa


The longpot concept
The LONGPOT Concept

Proton Beam

Emergency Stops

Tilt 13º

Stepper Motor

Bellows

Outer Weld Points

Beam Pipe

Flange

Primary Vacuum

Detector

Detector movement

Detector Pocket

CWT

(optional)

Rest Stops

Secondary Vacuum

Feedthroughs

Manchester 11-13 Dec 2005 MicroPot Revisited Jaak Lippmaa


What needs to be done
What needs to be done?

  • We really must sit down with Sebastian et al. and get rid of some tubes here and here

  • We must decide detectors

  • RF shielding calculations in Cockroft

  • Decide on safety pullout mech.

  • Full feasibility study and risk analysis

  • Design & Construction Schedule and active collaboration partners

Manchester 11-13 Dec 2005 MicroPot Revisited Jaak Lippmaa


That's all from me

Manchester 11-13 Dec 2005 MicroPot Revisited Jaak Lippmaa


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