[Spm] Power supply for tip self-sputtering

[Dzmitry Yarotski]

Hello,

We are going to use a self-sputtering process to clean tungsten STM tips in
situ using Ne gas and monitor the field emission threshold as a function of
the sputtering time. This requires special high-voltage power supply, which
is capable of outputting DC voltages of up to 1 kV with both polarities.
Also, it should be able to operate in two modes: for FE,
the high voltage is tuned and the current is measured with a sensitivity of
0.1-1 nA. It is nice feature to have, but what we really want is this:
self-sputtering mode where the
applied voltage is controlled to maintain a preset constant current of 1-100
microamps.
So, I’d like to ask everyone here is they know any commercial unit that can
do this kind of things? I really appreciate your help.

Regards,
Dmitry

Dzmitry Yarotski
Los Alamos National Laboratory
Center for Integrated Nanotechnologies
MPA-CINT, MS K771
Los Alamos, NM 87545

Phone : (505) 665-9294 (Office)
              (505) 667-8847 (Lab)
Fax   :  (505) 665-9653
e-mail: dzmitry at lanl.gov

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