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AB-LTC Technical Review. Extraction Protection Elements, TCDS, TCDQ. Wim Weterings Contributions from Brennan Goddard Marta Sans Merce Benoit Riffaud Marcel Gyr. Outline. Introduction TCDS – TCDQ Concept Technical Solutions Planning Status & Conclusion. Introduction.

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slide1

AB-LTC Technical Review

Extraction Protection Elements, TCDS, TCDQ.

Wim Weterings

Contributions from

Brennan Goddard

Marta Sans Merce

Benoit Riffaud

Marcel Gyr

outline
Outline

Introduction

TCDS – TCDQ

Concept

Technical Solutions

Planning

Status & Conclusion

introduction
Introduction

TCDS:Fixed diluter block to protect the MSD Septa in the event of an asynchronous firing of the MKD kickers.

TCDQ: - Mobile diluter block to protect Q4 magnets in the event of an asynchronous firing of MKD kickers.- Protects the arc at 450GeV and the triplet apertures at 7TeV from small impact parameters bunches.

some design parameters
(Some) Design Parameters
  • TCDS - Dilute about 6.1 MJ of energy, ~ 1.7% of the energy contained in the LHC beam at 7 TeV.
  • TCDS - Max. 300°C in MSD vacuum chamber and max. 100°C in the MSD Yoke.
  • TCDS - Aperture for circulating beam (n1≥ 6.5)
  • TCDQ - Max. energy deposition in Q4 of ~100 J/g.
  • TCDQ movement 15 mm (10σ at 7TeV and 450GeV)withprecision of 0.25mm (0.5 σ at 7TeV).
  • Nominal vacuum pressure of <10-8 Pa.
  • Assure a low transverse machine impedance.
  • Limit radiation exposure of personnel.
tcds concept
TCDS Concept

Functional Specification LHC-TCDS-ES-0001 (EDMS 393973)

0.5m

Ti

4.5

g/cm3

1m

AlN

3.31g/cm3

1m

Graphite

1.77 g/cm3

2m

Carbon Composite

1.4 g/cm3

1.5m

Graphite

1.77 g/cm3

slide6

TCDS Technical Solution

MSD

  • Two 3 meter long vacuum tanks – Ø250mm.
  • Two sublimators and two 400l/s ion pumps/tank.
  • ~500mm for interconnection.
  • Independent supports with 3 point alignment.
tcds technical solution
TCDS Technical Solution

Absorber Blocks

CirculatingBeam

ExtractedBeam

tcdq concept
TCDQ Concept

Functional Specification LHC-TCDQ-ES-0001 (EDMS 01/2004)

  • Initial MARS simulations resulted in a 10m C + 1m Fe structure.(N. Mokov et al., Fermilab, FN-0724)
  • Iterations in FLUKA are ongoing with Q4 implemented in geometry.(M. Sans Merce AB/ATB)
  • Preliminary results favour a ‘TCDS-Type’, but longer, structure.
slide10

TCDQ Technical Solution

Absorber Block

TCDS

TCDQ

Motorisationsystem

CirculatingBeam

status conclusion
Status & Conclusion
  • TCDS Functional Specification approved, TCDQ Functional Specification to be approved 01/2004.
  • One full time designer is working on the project, with an additional designer starting 01/2004.
  • Assembly and construction options (in-house vs outsourced) presently being studied in the light of group reçourses and priorities.
  • Advancement is still according to work unit planning, TCDQ schedule tight but still feasible (no room for delays).
slide13

Status & Conclusion

  • No problems anticipated for the CtC.
  • No problems anticipated to reach the design parameters.
  • EDMS / Hardware baseline documentation minor, but present.
  • Integration studies in collaboration with ICL have started.
  • Installation issues have not yet been looked at.