Micromass Quattro Ultima, User Manual

Page: 204 / 227

The Analyser
Quattro Ultima is fitted with a pre-filter assembly that is designed to protect the main
analyser by absorbing contamination from the ion beam. As a consequence the
analyser quadrupoles should never, under normal working conditions, require cleaning.
The hexapole transfer lens also serves to effectively remove contamination, and the
pre-filter assembly should only require cleaning on an infrequent basis. Although
training is given during installation, it is strongly recommended that this task is carried
out by a Micromass service engineer or by other suitably qualified personnel.
The quadrupole assemblies of Quattro Ultima are finely machined and aligned
assemblies which
under no circumstances should be dismantled.
The Detector
The Quattro Ultima detector system has been designed for trouble-free operation over
many years. The photomultiplier is encapsulated in its own vacuum envelope and is
therefore safe from contamination and pressure surges. The conversion dynode and
phosphor are also long lasting. No routine maintenance is required.
It is strongly recommended that assistance is sought from Micromass if maintenance
to the detector system is thought necessary due to spikes or unacceptably high noise
levels.
Maintenance and Fault Finding
Page 204
Quattro Ultima
User's Guide