The mechanics for the MUonE tracker support - CERN Indico
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The mechanics for the MUonE tracker support
Carlo Ferrari1,2, Marco Incagli2, Maurizio Massa2, Andrea Moggi2, Riccardo Pilato2,
Graziano Venanzoni2, Giovanni Cantatore3, Marin Karuza3
1) National Institute of Optics (SS Pisa) - CNR
2) INFN Pisa
3) INFN Trieste
MUonE Collaboration meeting
CERN – 12 February 2020
2021 pilot run @ CERN
• 2 stations, 1 m long (how many targets? We must decide ASAP)
• Before the first station, a beam measuring station, which is a standard station without the target:
• 3 Thorlabs breadboard, 900 mm x 600 mm x 60 mm (mod. B9090A, 1200 Euro each)
• 3 passive support frame, 900 x 600 mm (mod. PFR6090-8, 1100 Euro each)
Carlo Ferrari, INO-CNR – MUonE CM, 12 February 2020 11
The tracker support
Each station will be placed on a support structure that must be:
• rigid enough to withstand the weight of the module without flexing significantly;
• have damping capability to dissipate energy from induced vibrations;
• have the possibility of aligning the axis of the station with the beam at the millimeter level.
A simple and stable solution, optimal for the Pilot Run, can be achieved by means of a standard
honeycomb optical breadboard and an alignment platform. A more integrated solution will be designed
for the full structure.
Station
Since the supporting breadboard and the station will have different CTEs, the
relative coupling must be carried out by suitable mean (e.g. kinematic coupling):
three spheres on the breadboard and three suitable grooves on the bottom of the
stations.
The kinematic coupling allow a “simple” removal/installation of the stations, i.e.
roll-in/roll-out, in order to remove them from the beam path (assuming flexible
cooling pipes, and managing several other electric cables) and re-installing in
place without loosing the alignment. Breadboard
Carlo Ferrari, INO-CNR – MUonE CM, 12 February 2020 10
The tracker support
https://www.corisnc.it/wp-content/uploads/2017/02/04_Elementi_di_allineamento_ed_appoggio_perni_di_serraggio_e_bloccaggio_flottante.pdf
Appoggio a vite con base piana e filettatura
Puntalino con sfera rotante
ANDREASMAIERFELLBACH
www.amf.de
Puntalino prismatico
Carlo Ferrari, INO-CNR – MUonE CM, 12 February 2020 10
The tracker support
Station
Just the flat surface of the INVAR plate
Hole on the surface of the INVAR
plate, F = 8 mm,
the sphere is trapped in the hole
Back
Breadboard
Front
Beam (target)
Carlo Ferrari, INO-CNR – MUonE CM, 12 February 2020 10
Thorlabs Kinematic Breadboard Seats
KBS98 Kinematic Breadboard Seats
Station
Just the flat surface of the INVAR plate
https://www.thorlabs.us/thorprodu
MAGNET ct.cfm?partnumber=KBS98B
Hole on the surface of the INVAR
plate, the sphere is trapped in
KBS98 Kinematic Breadboard Seats Breadboard the hole
https://www.thorlabs.us/thorpr
oduct.cfm?partnumber=KBS98T
Carlo Ferrari, INO-CNR – MUonE CM, 12 February 2020 10The aligment
1) leveling of the telescope takes place through the three threaded supports
2) The alignment of the target takes place through a linear translation stage under the
support connected to the groove (normal to the axis)
Newmark systems inc PI
NLS4 SERIES LINEAR STAGE M-414.1DG LINEAR STAGE
• Travel Range 50 mm • Travel Range 100 mm
• Resolution 0.03 μm • Resolution 0.023 μm
• Accuracy 0.0003 mm/mm • Max. Speed 3 mm/sec
• Max. Speed 12 mm/sec • Unidirectional Repeatability 1 μm
• Unidirectional Repeatability 1 μm • Max Load 50 kg
• Max Load 22.6 kg • Push/pull force 5 kg
• Axial Load 11.3 kg • Thickness 57 mm
• Thickness 45 mm
3) The alignment of the telescope axis takes place through a second linear translation stage
under the support connected to the hole (normal to the axis)
Carlo Ferrari, INO-CNR – MUonE CM, 12 February 2020 12Alignment stability vs. T
• The deformation of the breadboard (10 um / 1 °C)
results into a rotation of station axis of 10 urad
Back
Breadboard deformation (in any
directions) will translate the whole
station along the beam axis
Front
Beam
• The deformation of the “appoggio a vite” (1 um / 1 °C) (target)
results into a misalignment of the horizontal module
alignment of 1 urad
Carlo Ferrari, INO-CNR – MUonE CM, 12 February 2020 10The vertical aligment
1) leveling of the telescope takes place through three vertical linear stages, some options:
Thorlabs MLJ150/M
Newport
Thorlabs Vertical Linear Stage
Vertical Linear Stage
Lab Jack 2800 Euro
1000 Euro
420 Euro • Travel Range 50 mm
• Travel Range 13 mm
• Travel Range 26 mm • Resolution 1 nm
• Resolution 0.05 μm
• Max Load 20 kg • Max Load 20 kg
• Max Load 11.1 kg
Carlo Ferrari, INO-CNR – MUonE CM, 12 February 2020 12You can also read
