Design verification Show design satisfies requirements Design validation

Introduction

• Introduction

• Design verification

• Show design satisfies requirements

• Design validation

• Show design was validated through testing and prototype

• Fabrication

• Cost comparison

• Summary

Design presented is part of 12 GeV Upgrade Project at JLAB

• Design presented is part of 12 GeV Upgrade Project at JLAB

• Requires 10 each 100 MV cryomodules (C100)
• Requires 80 cavities (7 cell, 1497 MHz, CW)
• Production schedule spans FY09,10 and 11.

• Original design used Titanium Helium Vessel

• Two versions installed in three prototypes

• New design uses Stainless Steel Helium Vessel

• Motivation – reliability, cost, manufacturing

Helium vessel design was validated by:

• Helium vessel design was validated by:

• Thermal shock in liquid nitrogen & leak check of braze joint (x3/joint)

• VTA cycle to 2K (x2/cav)

• Thermal cycle to 2K in HTB (x1)

• Functionally tested in HTB

• Pressure test of “Helium Vessel Head Test Fixture”

• Note : HTB is the Horizontal Test Bed – a facility for testing up to two cavities with cryomodule boundary conditions

HTB test verified that the design meets the requirements

• HTB test verified that the design meets the requirements

• Design has been validated through HTB test and prototype testing

• The SST helium vessel is easily fabricated using standard machining, welding and brazing techniques

• The SST helium vessel has significant cost savings versus the Ti design