Spectromag4000-10 Magnet System

 

Magnet Core System

·        Horizontal field split pair magnet

·       Central field 10T  4.2 K

·       Homogeneity 0.8 % over a 10 mm diameter sphere

·       Stability in persistent mode 1 x 10^-4 / hr

·       10 V resistor/diode protection circuit

·       Persistent mode switch

·       0.18 l/hr helium consumption (with zero flow through insert and zero current in leads)

·       0.95 l/hr helium consumption (with zero flow through insert and full current in leads)

·       20 l usable helium volume providing > 100 hr hold time

·       0.5 l/hr nitrogen consumption

·       24 l nitrogen volume providing 48 hr hold time

4 off horizontal optical access, two parallel to field, two perpendicular to field, fitted with Spec. B quartz windows

 

 

 

Beam Access (A Mylar Variable Temperature Insert)

SM4000VTI-MYLAR variable temperature insert for Spectromag 4000 with:

·       25 mm diameter sample space

·       Temperature range 1.5 - 300 K (measured at heat exchanger)

·       ± 0.1 K temperature stability

·       Capillary fed heat exchanger fitted with heater and Cernox sensor

·       Automatic needle valve operated via ITC controller

4 off horizontal 10 mm clear diameter optical access, two in field direction, two perpendicular to field direction, fitted with Mylar windows, nominal thickness 0.003”

 

 

Beam Access (A Mylar/Optical Variable Temperature Insert)

SM4000VTI-MYLAR/SPECB variable temperature insert for Spectromag 4000 with:

·       25 mm diameter sample space

·       Temperature range 1.5 – 300 K (measured at heat exchanger)

·       ± 0.1 K temperature stability

·       Capillary fed heat exchanger fitted with heater and Cernox sensor

·       Automatic needle valve operated via ITC controller

·       4 off horizontal 10 mm clear diameter optical access, two in field direction fitted with Mylar windows, two perpendicular to field direction, one fitted with Mylar window, one fitted with Spectrosil B quartz window.

·       Mylar windows nominal thickness 0.003”

 

 

OVC Mounts

·       Aluminium mounts. Internal diameter 10 mm (with no sharp edges) to fit standard outer vacuum case window mount

    M2 threads provided to allow clamping of Be foil (Be foil not supplied)

 

Hinged sample rod

·       Manual ± 15 mm axial movement and  360 rotation.

·       Fitted with three 10-pin Fischer connectors, one wired, two unwired

Hinged to reduce top loading height to 1.9 m above base of tails of cryostat. (approx. 1.72 m above window centre line of SM4000-10)

 

ECSM electronic control

IPS120-10 superconducting magnet power supply:

·       ± 120 A output current

·       ± 10 V output voltage

·       Current setting to 1 mA from the front panel, 0.1 mA via the computer interface

·       Bipolar operation

·       Current stability of ±3 mA/°C

·       RS232 and IEEE interfaces

·       Switch heater control

·       Digital display of field or current as required

·       Auto rundown facility.

·       Instrument case and 6 m current leads

·        magnet power supply

 

ITC503 digital temperature controller:

 

·       Single channel input

·       Upgradeable to 3 channel input

·       4½ digit display

·       IEEE488 and RS232 interfaces

·       Standard calibration curves built-in

·       Auto-ranging

·       Auto-PID setting

·       'ObjectBench' software for data-logging and range handling

·       Ability to control auto needle valves

·        temperature controller

ILM211 nitrogen and helium double level meter and probes:

 

·       Sensing method: capacitance for nitrogen; superconducting wire for helium

·       Nitrogen probe - maximum length 2 m, diameter 6.35 mm

·       Helium probe maximum length 1 m, diameter 4.8 or 9.5 mm

·       Variable sample rate for helium level (5 s to 33 hr)

·       Low level fill indicators for auto-fill systems

·       Audible low level alarm

·       Digital display

·       Display units: percent

·       Display resolution 0.1%

·       RS232 interface (IEEEINF optional IEEE interface)

·        liquid nitrogen and liquid helium double level meter and probes

 

 

 

SMSH3 optical holder with 15 mm diameter aperture and clamp

 

 

EPS40 helium pumping system comprising:

 

·       40 m³/hr rotary pump

·       Base pressure 1 mbar

·       2 m long flexible pumping line and valve

 

 

TTN2FDH flexible liquid helium transfer tube with demountable coupling:

·        2 x vertical legs, 1 m long x 9.5 mm diameter, 1.5 m long x 9.5 mm diameter

·          Flexible horizontal section, 1.5 m long including demountable coupling for ease of use fitted with standard evacuation port

 

 

 

REBT set of re-entrant bore tubes

 

 

 

SCI extra sensor channel interface for ITC series:

 

·       Provides 2 additional sensor channels