The test setup was to be mounted into the CASYMS calibration chamber . The chamber has a diameter of 1200mm and is equipped with a turntable allowing the rotation and translation of the setup relative to the incoming ion beam provided by the calibration facility. The test setup was divided into two parts. In the first part a neutral atom beam had to be created out of the ion beam. This was done by reflecting the ion beam from a polished tungsten surface. Upon reflection the primary ions get neutralized with an efficiency close to 100%. Primary molecular ions also dissociate to a large extent making it advantageous to use a molecular primary beam as molecular beams have a much higher intensity at CASYMS. Ion optics removed remaining charged particles after reflection from the neutralization surface. The neutral beam was also geometrically collimated using several slits. The second part was the actual instrument prototype with conversion surface, extraction lens, and time-of-flight section, for which a modified version of a CODIF instrument  was used.
March 2001 - Martin Wieser, Physikalisches Institut, University of Berne, Switzerland