Impedance of current tcp compared to new tcp with button
This presentation is the property of its rightful owner.
Sponsored Links
1 / 13

Impedance of current TCP compared to new TCP with button PowerPoint PPT Presentation


  • 38 Views
  • Uploaded on
  • Presentation posted in: General

Impedance of current TCP compared to new TCP with button. New TCPP. Problem with heating of one TCP in 2012  removed Collimation team decided to profit from an option in the existing contract to build one new spare, and proposed to insert BPM in TCP.

Download Presentation

Impedance of current TCP compared to new TCP with button

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Impedance of current tcp compared to new tcp with button

Impedance of current TCP compared to new TCP with button


New tcpp

New TCPP

  • Problem with heating of one TCP in 2012  removed

  • Collimation team decided to profit from an option in the existing contract to build one new spare, and proposed to insert BPM in TCP.

     OK for impedance team? Need a recommendation

  • Context: new TCTP design was not recommended to be extended to other collimators and below a certain gap due to the increase of tapering angle from 11 degrees to 16.5 degrees.

     However, primary collimators have a special jaw with a 10-degree-taper close to the beam.

     maybe not as critical as for other collimators since the modified tapering would be in the shadow of this tapering angle and further away from the beam.


Current tcp

Current TCP

Current design

New design

10 degrees

600 mm

68.5 mm

11 degrees

1194 mm


New design proposal

New design (proposal)


Impedance of current tcp compared to new tcp with button

Jaw for new TCP with buttons in fact smaller first angle 6.34 degrees compared to 11 degrees for phase 1


Reminder tctp and tcsp

Reminder: TCTP and TCSP


New design proposal1

New design (proposal)

  • Similar impedance between current design and new design


New design proposal2

New design (proposal)

  • Similar impedance between current design and new design


Conclusion from bpm tapering

Conclusion from BPM tapering

  • Could be accepted, no special issue at first sight.

  • Now, what about ferrite and RF contacts?


Should we close the gap

Should we close the gap?


A rguments

Arguments

  • Closing the gap suppresses modes, while ferrites try to damp them (see LRFF working group conclusions).

  • Ferrites have an optimal frequency range of operation

  • Ferrites can heavily suffer from beam induced heating

  • RF contacts may lose contact (in this design with BPM there are long contacts that are more challenging)

  • Serious problems encountered both with ferrites and non-conforming RF contacts in the machine

    Argument not related to impedance

  • Ferrites can cause outgassing and can break easily

  • RF contacts can cause UFOs


Proposed recommendation

Proposed recommendation

  • With the information we have, we would recommend RF contacts and reiterate the RF contacts design if necessary for reliability reasons.

  • Is it possible to devise a redundant solution? (e.g. with ferrite behind the RF contacts)

  • If possible, we could reinvestigate hybrid options (RF contacts everywhere except where long contacts are needed, and keep the possibility to install a few ferrites).


New idea to collect dust nice resonating plates

New idea to collect dust… Nice resonating plates!


  • Login