SSR1 Fabrication at IUAC Present Status Abhishek Rai, P.N.Prakash, - - PowerPoint PPT Presentation

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SSR1 Fabrication at IUAC Present Status Abhishek Rai, P.N.Prakash, - - PowerPoint PPT Presentation

Nov 20, 2022 31 likes •121 views

SSR1 Fabrication at IUAC Present Status Abhishek Rai, P.N.Prakash, J.Sacharias, K.K.Mistri IUAC, New Delhi INDIA Overview New Developments Whats next Difficulties New Developments Completion of all the four End Walls.

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SLIDE 1

SSR1 Fabrication at IUAC – Present Status

Abhishek Rai, P.N.Prakash, J.Sacharias, K.K.Mistri IUAC, New Delhi INDIA

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SLIDE 2

Overview

  • New Developments
  • What’s next
  • Difficulties
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SLIDE 3

New Developments

 Completion of all the four End Walls.

  • Since the last presentation, the two remaining End Walls

have also been completed with the Daisy ribs and Donut rib attached.

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SLIDE 4

New Developments

 Electropolishing(EP) of the two Outer Shells.

  • Since the last presentation, the two Shells have been

electropolished (~125 μm).

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SLIDE 5

New Developments

Spoke to Shell collar.

  • Copper trials are now in the final stages after

several iterations.

  • Die/Punch are being tweaked for the final forming

trials.

  • Forming of the actual Niobium pieces should start

as soon as the dimensional accuracy on the copper parts is established.

  • This should happen by the middle of February.
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SLIDE 6

New Developments

Electropolishing (EP) of the End Walls.

  • A conical shaped aluminum coil has been fabricated which

serves as the cathode / heat exchanger.

  • The setup is ready and EP will start from tomorrow.
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SLIDE 7

What’s Next

Spoke to Shell Collar forming and welding.

  • Forming trials on copper are in final stages.

EP of the two Spokes.

  • EP of Spoke will be done after the Spoke to Shell Collar

and the Beam Port is welded.

 Shell to Spoke welding

  • Weld parameter development for the critical saddle weld

will be started shortly. We will use the niobium piece used for developing the Shell Coupler Port pullout.

 Tuning of the cavity at room temperature and 1 atm.  Shell to End Wall welding.

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SLIDE 8

Difficulties

During the EP of the Shells, the PP (?) extension reacted with acid and became soft where it seals with the

  • Shell. We were able to EP the two Shells though.
  • Probable cause Faulty Material (probably the material

was not (PP)

  • We then procured fresh PP material from another party on

urgent basis and got a new extension fabricated.

  • It was difficult to procure the material as no vendor was

ready to supply a single piece of this dimension (600 x 600 x 200).

Time lost ~ 2 Months

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SLIDE 9

Thank you !!