MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert...

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MDI alignment progress The pre-alignment of the QD0’s s van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, y van der Graaf, Henk Groenstege, Joris van Heijningen, Jan Koopstra ne Mainaud Durand,, Richard Rosing, Vivien Rude , Nikhef IWAA 2012 Fermilab, Sept 13, 2012

Transcript of MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert...

Page 1: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,

MDI alignment progressThe pre-alignment of the QD0’s

Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon,Harry van der Graaf, Henk Groenstege, Joris van Heijningen, Jan Koopstra,Helene Mainaud Durand,, Richard Rosing, Vivien Rude CERN, Nikhef

IWAA 2012Fermilab,

Sept 13, 2012

Page 2: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,
Page 3: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,

X

Y

X

Y

X

Y

Alignment of two objects:- omit Z- omit rotZ

Measure:- translation X- translation Y- rotX-rotY

-Equivalent to-4 points (X,Y)

Page 4: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,

Momentum Measurement of chargedparticles in the L3 experiment:Chamber Position Monitoring

• Lorentz Force:• Track Curvature measurement

Detector

Muon Particle Track

Detector

Detector

Page 5: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,

Direct measurement: two anti // Rasniks:

light source + image sensor

lens

… would only require path of sight of 20 mm2….…. along beampipe…..!

Page 6: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,
Page 7: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,

Monitor X,Y of (both) QD0 end ref’s with respect to RR(with Rasniks)

to be calibratedon 3D measuring machine

Page 8: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,

Rasnik Lines-of Sight

spokes

Page 9: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,

Reference Ring RR

Page 10: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,

Spoke

- length 3.5 m;- has only one function: to transfer radial position better than 1 μm

Material: Zerodur: thermal expansion coefficient < 0.2 x 10-6

Page 11: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,

Alignment is NOT influented by:

- (common) deformation of RRs (sag, spoke load)- temperature of individual RR- (common) deformation of spoke wheel (spoke weight compression)- temperature of individual spoke wheel

Page 12: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,

Spoke tip on RR side: contact definition < 0.1 μm

Steelball Zerodur rod (6 mm x 6 mm x 3500 mm

spoke support tube: flexo suspension

Page 13: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,
Page 14: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,
Page 15: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,
Page 16: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,
Page 17: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,

Inner spoke detailOuter spoke detail

Precision ringQD0 support tube

Page 18: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,

Volume reserved for support plate of Rasnik/Rasdif

Radial retraction for endcap opening

Page 19: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,
Page 20: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,
Page 21: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,
Page 22: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,
Page 23: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,
Page 24: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,
Page 25: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,

1983: 4QD Red Alignment System Nikhef (Rasnik)

1993: CCD Rasnik

2003: RasDif: long distance

Page 26: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,

Comparison Stretched Wire Systemversus RasDif (TT1)

RasChain: interconnected Rasnik systemsfor basic CLIC units of 2010 mm

MDI/QD0 alignment: vibrations

- new (green) semiconductor lasers- shielding- image analysis software

Page 27: MDI alignment progress The pre-alignment of the QD0’s Niels van Bakel, Bram Bouwens, Hubert Gerwig, Lau Gatignon, Harry van der Graaf, Henk Groenstege,

diffraction plate simulated measured

Thermal shielding of light path


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1 Multiple Sequence Alignment(MSA). 2 Multiple Alignment Number of sequences 2 Global alignment Seek an alignment that maximizes score.

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