mars

Instrument responsible: Dr. P. Allenspach 




MARS is a project of a time-of-flight backscattering
instrument with inverted geometry at the new neutron spallation source SINQ,
PSI Villigen, Switzerland. Five choppers
running at a frequency of 50 Hz (with an option of up to 350 Hz for the
first chopper) tailor the neutron beam into a pulse of neutrons with an
energy band width which depends on the
incident energy. Neutrons will, depending on their energies, hit the sample
at different times, but only neutrons with a final energy matching the analyzer
energy will be counted in the time sensitive detectors. (see Concept
study in PDF-format (Feb. 2000)) 



Instrument Movie
(1.7 MB, cross-platform)



The secondary instrument will consist of mobile
mica analyzer banks and detectors (Movie [70 KB, cross-platform]) with the advantage
of a matching of the primary and secondary
resolutions and hence an increased neutron
intensity for higher incident energies (smaller scattering angles).
The ranges from 1 µeV (elastic peak position) to 0.03 meV (10 meV
energy transfer). 









 Transport of MARS-instrument container
 Putting into place through guide hall roof
 In place 



 
 
 







May 2004






 MARS Al-Container-Mantle
 Prototype Inelastic-Module



 
 



December 2003



Neutron Guide Hall Extension started: 



 Guide Hall Location
 MARS Position



 
 



October 2003
The defect neutron
guide in the guide bunker wall is being replaced by a new guide. The new
1.5m-pieces are presently being measured and investigated. They will be
installed in the second part of January 2002:






 Old guide
 New guide



 
 



January 2003



 



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Last Modified : May. 28 2004 S. Janssen