Panmure Instruments Ltd - Precision Engineering - Services

This is a new ultra high vacuum (UHV) compatible goniometer for applications which require accurate angular alignment of a target with a particle beam and detector, as, for instance, encountered in Rutherford backscattering spectroscopy and channelling, low-energy ion scattering (ion scattering spectroscopy) and atom beam scattering experiments.

The instrument, pictured above, facilitates rotation of a target about three perpendicular areas with an angular reproducibility of better than 0.05°. It is shown mounted onto a high precision xyz translator which adds three target translation. All six drives can be converted for stepper motor drive.

The instrument is a completely redesigned version of our original 3-axis goniometer introduced over a decade ago which has proven its long term reliability.

Arrangements have been made on the specimen mount for the mounting of a detachable or fixed target holder. The detachable holders may be transferred under vacuum from an insert chamber in which six samples can be vacuum-loaded at any time.

The goniometer, target insert chamber with carousel and transfer system, can be obtained as an add-on package to most existing scattering chambers.

Features available:

rotation about three independent perpendicular areas
can be mounted onto a precision xyz translator
angular reproducibility better than 0.05°
sample transfer system (used without cooling)
sample heating
cooling down to -100°C
flange sizes and flange to target centre adjustable to suit customer requirements
all axes can be converted for stepping motor drive

Specification

fully UHV compatible incorporating stainless steel bellows, bearings and internal components
fitted with RMD34 precision rotary drives as standard
flange to target centre made to customers' requirements, minimum length 300 mm
specimen movements
horizontal axis (R1) 360°
vertical axis (R2) 360°
tilt (R3) ±20°

calibrations

R1 one-turn handwheel 1.0°
R2 one-turn handwheel 3.6°
R3 one-turn handwheel 1.0°
minimum side glancing angle 3.0°
intersection of all three axes to be within a 0.08mm diameter sphere

 

Motorised
The goniometer can be automated by fitting stepping motor drive attachments, such as those of our type RMD34. Careful orientation of the motor dirves can reduce installation size.

This is a precision remote control, 3-axis goniometer, typically used for ion beam channelling experiments.

The goniometer allows for crystal orientation in three planes inside a vacuum chamber at pressures of the order of 10-6torr. Also available is a translation table attachment (shown in the picture) which gives the operator an additional fourth linear movement of ±30mm. The movements on the goniometer are driven by 200-step Phytron stepping motors.

Specification

each movement is independently driven by 200-step Phytron stepping motors
rotation in the x and y axes has a full 360° movement, the resolution being 3 steps of motor = 0.01°
the tilt z-axis is ±30° about the vertical, the resolution being 3 steps of motor =0.01°
intersection of all 3-axes is to be within a 0.05mm diameter sphere
specimen mount is threaded 50mm diameter x 1mm pitch

Outline dimensions

(inc.translation table) height 336 mm maximum
translation table diameter 191 mm
width (measured from centre of translation table) 140 mm maximum

This Precision Specimen Translator has been introduced to complement our range of Rotary Specimen Manipulators and UHV Goniometers.

We believe this to be the only translator on the market specifically designed for Computer Control. Each axis is fitted with a handwheel which is itself a toothed belt drive pulley and the body has mounting facilities to accept a Standard Stepper Motor drive attachment.

Made to the very highest standards of accuracy, this unit features six mini CF34 vacuum input flanges set at an angle to give easy access.

The Z Translation is available in varying lengths to suit individual requirements.

Specification

fully UHV compatible incorporating stainless steel bearings, bellows, vacuum flanges and access ports
main superstructure - anodised aluminium alloy
linear and rotary measuring scales on all three axes
cross roller slideways and recirculating ball bearings
bakeable to 200° without dismantling
pressure range to 10-11 mbar
six CF34 feedthrough ports
tooth belt pulley handwheels

Additions

full range of specimen manipulators and goniometers
liquid nitrogen cooling
electron bombardment heating attachment
stepping motor drive systems for all motions

Motions

x translation +/- 30.0mm
y translation +/- 30.0mm
z translation 25mm standard (and greater translations up to 500mm are available) 

The Panmure rotary/linear specimen manipulator utilises a unique eccentric drive mechanism which is beneficial in two ways. Firstly it enables the component parts to be manufactured to the most exacting tolerances, and secondly we can now directly couple the linear motion shaft to the micrometer thimble eliminating the use of spring returns.

These benefits used in conjunction with ball bearings throughout give this drive a smooth feel and enable it to run at high speed with large loads for a long expected life.

Specification

fully UHV compatible incorporating stainless steel bellows, bearings and internal components
external components - anodised aluminium alloy
360° continuous rotation
25mm linear travel
up to 350 rpm maximum speed
angular calibration 360° in 5° steps
shaft concentricity to 0.050mm
mounted on a 70mm conflat flange
fully bakeable to 250°C without dismantling
pressure range: to 10-12 mbar

Additions

bearing housings and shaft length to suit customers requirements
stepping motor drive systems

Torque

3250 Ncm maximum - hand operation
30 Ncm maximum at 500 rpm

Outline dimensions

465 mm length maximum
70 mm diameter maximum
3 mm diameter minimum

The Panmure double rotary drive is truly unique in two ways. Firstly, because both rotations use the eccentric drive mechanism that enables us to produce all our manipulators with ultra high precision on high rigidity. Secondly, we can solidly couple to both motions so as to give direct rotation of one shaft inside the other. Both shafts give a continuous 360° rotation.

Specification 2XRMD70

fully UHV compatible incorporating stainless steel bellows, bearings and internal components
external components - anodised aluminium alloy
360° continuous independent rotation, both axes
angular calibration 360° in 5°steps
shaft concentric to within 0.050 mm
mounted on a 70mm conflat flange
lock srews on both rotations
fully bakeable to 250 °C without dismantling
pressure range: to 10-12 mbar
toothed belt pulley handwheels

Additions

bearing housings and shaft length to suit customers' requirements
stepping motor drive systems

Torque

Inner rotation
2000 Ncm maximum - hand operation
30 Ncm maximum at 500 rpm

Outer rotation
3250 Ncm maximum - hand operation
30 Ncm maximum at 500 rpm

Outline dimensions
494 mm length maximum
75 mm diameter maximum
4 mm diameter minimum

The Panmure range of rotary specimen manipulator utilises a unique eccentric drive mechanism which enables the component parts to be manufactured to the most exacting tolerances required.

This, in conjunction with the use of more rolling bearings, gives this drive the smooth feel for which it is renowned, and enables it to run at higher speed with greater loads for longer.

Specification for RMD 34 and RMD 70

fully UHV compatible incorporating stainless steel bellows, bearings and internal components
external components - anodised aluminium alloy
360° continuous rotation
up to 500 rpm maximum speed
angular calibration 360° in 5° steps
shaft concentricity to 0.050mm
mounted on a conflat flange
locking screw fitted
fully bakeable to 250°C without dismantling
pressure range: to 10-12 mbar
tooth belt pulley handwheel

Additions

extended bearing housing and shaft
stepping motor drive system

Torque

RMD 34
2000 Ncm maximum - hand operation
20 Ncm maximum at 500 rpm

RMD 70
3250 Ncm maximum - hand operation
30 Ncm maximum at 500 rpm

Outline dimensions

RMD 34
159 mm length maximum
50 mm diameter maximum

RMD 70
187 mm length maximum
70 mm diameter maximum

The Panmure range of rotary specimen manipulator utilises a unique eccentric drive mechanism which enables the component parts to be manufactured to the most exacting tolerances required.

This, in conjunction with the use of more rolling bearings, gives this drive the smooth feel for which it is renowned, and enables it to run at higher speed with greater loads for longer.

Specification for RMD 34 and RMD 70

fully UHV compatible incorporating stainless steel bellows, bearings and internal components
external components - anodised aluminium alloy
360° continuous rotation
up to 500 rpm maximum speed
angular calibration 360° in 5° steps
shaft concentricity to 0.050mm
mounted on a conflat flange
locking screw fitted
fully bakeable to 250°C without dismantling
pressure range: to 10-12 mbar
tooth belt pulley handwheel

Additions

extended bearing housing and shaft
stepping motor drive system

Torque

RMD 34
2000 Ncm maximum - hand operation
20 Ncm maximum at 500 rpm

RMD 70
3250 Ncm maximum - hand operation
30 Ncm maximum at 500 rpm

Outline dimensions

RMD 34
159 mm length maximum
50 mm diameter maximum

RMD 70
187 mm length maximum
70 mm diameter maximum

This unit has been designed to assist with Multi-sampling and movement of samples within the UHV environment. Specifically designed for use with our range of Specimen Manipulators and Goniometers it could easily be modified to accommodate any sample size or loading system. Ideally the carousel would be mounted in a Sub-Chamber, isolated from the Main Chamber by a suitable Gate Valve and would be used in conjunction with a magnetically coupled Linear/Rotary Drive complete with a pick-up device. Samples would be collected in the Sub-Chamber and transferred through the valve to the Main Chamber and there deposited on to the Manipulator

This unit cannot be used in conjunction with the LN Cooling System.

Specification

(for RMD34 and RMD70)
all components made in natural finish aluminium alloy or stainless steel
six locating sample positions
two transfer positions
sample holders all stainless steel and tantalum

Additions
magnetically coupled linear/rotary drives with stroke lengths available from 450-1500 mm
sample holders to suit any system
subchambers
valves

Outline dimensions
carousel base 140 mm