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Laboratory for Neutron and Muon Instrumentation (LIN)

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Instrument Upgrades


CAMEA upgrade of secondary instrument

Upgrade

  • Old triple axis Rita-II transferred to the multianalyser-box CAMEA
  • Sample table reinforced to allow the movement of the heavier analyzer/detector box
Drawing Overview of the instrument CAMEA
Instrument overview
Drawing CAMEA scheme of neutron trajectory
Neutron trajectory

Fixing clip
Fixing clip

Analyzer

  • PG crystals
  • Crystals fixed on silicon-plates by clips
  • 8 segments with 8 energies

Basic set-up

  • Total weight of secondary instrument without sample table ~10 tons
  • Shielding  polyethylene and borated aluminum
  • Vacuum-vessel stainless steel
  • Neutron window aluminum
  • Be-filter cooled to 77°K
  • Radial collimator 1°
Drawing Overview of the CAMEA multi-analyser system
Multianalyser-system
Picture View of the assembling of all crystals
Assembling of all crystals
Picture High accuracy manufactured crystal holders of CAMEA
High accuracy manufactured crystal holders
Picture Overview of the CAMEA instrument
Overview of CAMEA instrument

Air cushion assembly

  • 15 air cushion pads
  • Air cushion lifting stroke 0.06 mm
  • Maximal load per pad 800 kg
  • Vibration-insulating between instrument components and air cushion assembly
Drawing CAMEA air cushion assembly
Air cushion assembly

Detector tubes

  • 8 x 13 tubes
  • Compact construction (sub - ½ inch) for plug and adapter (in-house development)
  • Coaxial design
  • Detector tubes inside vacuum (tested up to 1e-8 mbar)
Picture CAMEA detector assembly detail
Detector assembly

Detector electronics

  • Position sensitive data streaming
  • Modular design of amplifier stages of the PSD detectors
  • Remote service and monitoring possible
  • Integration of 2nd generation data acquisition (in-house development)
Drawing CAMEA detector assembly
Picture CAMEA detector assembly top view
Picture CAMEA carrier board for up to 16 amplifier modules
Carrier board for up to 16 amplifier modules

Other electronics

  • Renewal of the complete motion control and PLC system
  • Inside "high radiation" use of resolver encoders
  • Improved resolver-electronics (in-house development)
  • Fully remote controllable
  • PLC-integration of the entire vacuum-technics
Picture CAMEA improved resolver electronics
Improved resolver electronics
Picture CAMEA vacuum technics
Vacuum-technics
Picture CAMEA motion control rack
Motion control

SANS-PA20 LLB Instrument transfer and adaption

Picture SANS-LLB at LLB CEA Saclay France
PA20 at LLB CEA Saclay France
Drawing SANS-LLB PA20 at SINQ PSI located in the former MARS instrument area
PA20 at SINQ PSI

MARS-removal

  • Instrument dismantling
  • Plasma cutting of aluminum vessel
  • Grouting of floor-pit
  • Modification of infrastructure (adaption of PA20)
Picture Inside view of MARS aluminum vessel being removed
Aluminum vessel of former MARS instrument
Picture overall view of MARS aluminum vessel being removed
Picture Plasma cutting of MARS aluminum vessel
Plasma cutting

PA20

  • 16m collimation
  • 19m detector tank
  • 2 sets of 3He detectors
Drawing SANS-I and SANS-LLB overall view
SANS-I and SANS-LLB (PA20) overall view
Drawing Lab/Workshop above SANS-LLB detector tank
Laboratory/Workshop above detector tank
Drawing staircases and concrete blocks shielding SANS-LLB
Drawing concrete block shielding SANS-LLB
Drawing neutron guide of SANS-LLB

Sample table (old table from former SANS-II)

  • Adaption of existing SANS-II table
  • Built for use with 15 T-magnet (vertical)
  • Maximum load 700 kg
Picture SANS-II sample table used for SANS-LLB
SANS-II sample table

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Contact

Laboratory for Neutron and Muon Instrumentation
PSI
CH-5232 Villigen PSI
Switzerland
+41 56 310 20 87
Fax: +41 56 310 2939

Head of LIN
Prof. Dr. Marc Janoschek
+41 56 310 49 87
marc.janoschek@psi.ch


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Telefax: +41 56 310 21 99

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