PSV and Power Supply
Manual (PDF)
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Filesize: approx. 450 KB.
Manual includes PSV Pulsed Supersonic Valve and PSV Power Supply
information.
A pulse beam source which is capable of providing a 55 microsecond pulse of gas at choke flow at 10Hz repitition rate. This is defined as the condition where beam pressure is limited only by the conductance of the nozzle,maximum flow is occurring and the full theoretical cooling has been obtained. This condition is evidenced by a flat topped pulse when measured with the FIG fast ion gage. Pulse widths as narrow as 20 microseconds can be obtained if maximum flow is not required.
The PSV Pulsed Supersonic Molecular Beam Valve operates on the magnetic beam repulsion principle, first applied to molecular beam valves by Dimov. The PSV design passes a current pulse of up to 5000 Amps and 20 microseconds pulse duration thru two parallel beam conductors in a hairpin configuration. The high current passing in opposite directions in adjacent conductors generates a magnetic force which lifts the top beam from the O-ring seal over the nozzle and opens the valve. This admits carrier gas to a supersonic free expansion nozzle which injects molecular beam pulses of approx. 60 microseconds pulse length into the sample vacuum chamber.
This
pulsed molecular beam source is a fully engineered product. It
is an instrument quality device for use in scientific
experiments. It was designed for easy accessibility, repair and
modification. It will last for extended use and requires
minimal maintenance.
DIMENSIONS:
3½ inch Diameter X 8 inches long
NOZZLE: Easily changed, 0.5mm Diameter standard 0.75mm or 0.35mm
optional (0.35mm available in Aluminum only)
MOUNTING: Directly to the stainless steel housing tube or by optional
XYZ translational mounts
BAKEOUT TEMPERATURE: To 150°C
ELECTRONICS CABINET: 5¼ inch high rack mounting. Pulse
input, output and delay circuits are provided. Overtemperature
and Overcurrent protected. All cables shielded for low noise propagation.
The Fast Ion Gage is a Bayard Alpert type high vacuum gage on which the grid dimensions have been reduced to increase speed of response. It was designed to observe the time profile of a short duration pulsed molecular beam.
Mounting method allows the grid structure to be extended into and withdrawn from the molecular beam without breaking vacuum.
RISE
TIME: Less than 5 microseconds
EMISSION: 0-10 ma. controlled from front panel. Indicated on front
panel. Fully regulated.
PROBE: Inserts through 2.75 inch CONFLAT. Insertion depth up to
6" from flange face.
GRID VOLTAGE: 0-300VDC Controlled from and indicated on front
panel.
CABINET SIZE: 19" Width X 3½" Height X 13½"
Depth
CABINET WEIGHT: 11½ Lbs.
OUTPUT: 0-300VDC Controlled from and indicated on front panel.
POWER: 115/230V, 50-60Hz
Fast
Ion Gage Price List
FIG Power Supply/Probe Manual (PDF) Click
on link to open
To download, right click on link and "save target as".
Filesize: approx. 326 KB.
Manual includes power supply specs and the operation procedure
for the Fast Ion Guage assembly.
Chambers and Flight Tubes are manufactured to match our source and detector, or, special designs to mate with the researcher's existing chamber and detector configuration. Flight tubes can include accessories lenses, and/or steering plates with flat, high transmission grids.
Accessories such as the Ion Source Shroud allow for differential pumping between the chamber and the flight tube. This shroud and skimmer (Part number B-682) increases resolution in a C-677 Lens Stack/Flight Tube Assembly to approximately 1000 when used with a supersonic jet. The D-679 Liner accessory is available to elevate the potential of the flight tube environment.
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Designed
to provide window access to vacuum chambers where odd angles or
cramped locations are a problem. The C-688 Laser Window consists
of a 1 inch diameter vacuum quick coupling which has been modified
by addition of an O-ring groove in its outer face which serves
as the vacuum seal with the face of the window.
The O-ring furnished is Viton. Replacement O-rings are available in Kalrez #1050 which allows operation at higher temperature. This formulation is also somewhat solvent resistant allowing it to be cleaned before use to avoid recondensation of contaminants on the face of the window.
The
window may be removed and replaced with a larger O-ring and backup
ring (C-689 Conversion Kit). The assembly can now be used as a
1 inch quick coupler for insertion of a probe, etc..The Quartz
used for the window has a transmission efficiency of 75% at 180
nanometers. Photo shows C-690F Laser Window Assembly (1.625
Dia.) on 2.75 ICF.
C-890 System Frame allows the rapid assembly of the flight tube, test chamber and pumping system. Height can be specified at the time of purchase and later it can be adjusted with levelling screws.
Either two or three 19 inch rack bays are on each side and one is on each end. These allow convenient mounting of instruments or screen panels.
The
flight tube is cradled between two round rails to allow easy retraction
for access to the ion source, detector or other
internal parts. Height of rails and chamber are adjustable for
precise alignment and to aid reassembly.
Casters allow the instrument to be easily moved by one person.
The short, Two (2) bay version is shipped assembled. The longer version is separated into two halves which are strapped together on a pallet for shipment.
Dimensions (approximate):
Length, 44 or 66 inches
Height, 30 to 36 inches
Depth, 23 inches or as required
Weight, 110 to 175lb.
Price
List