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attocube - Model attoDRY1000 -Top-loading Cclosed-cycle Cryostat with Superconducting Magnet
The attoDRY1000 is a closed-cycle cryostat setting new performance benchmarks. The attoDRY1000 was specifically designed to provide an ultra-low vibration measurement platform for cryogenic confocal microscopy without the need for liquid helium. The standard closed-cycle system enables vibration-sensitive experiments with a focus on low temperature optical measurements in a temperature range from 4 K to 80 K. Higher temperatures may also be reached by careful manual control of the pressure inside the cryostat1.
A controlled exchange gas atmosphere cools the optionally available microscope inserts. Superconducting magnets up to 9 T are available as an option. Due to a proprietary design, mechanical vibrations created by the pulse-tube coldhead are decoupled from the measurement platform.
The lateral vibrations observed in free-beam confocal measurements with diffraction limited resolution of about 0.5 µm are typically on the order of 50 nm, i.e. a small fraction of the spot size. The long term stability and ultra-low drift in such experiments is further secured by our low temperature objectives, and our very rigid attoCFM I external optics head.
Despite the mechanical decoupling between coldhead and sample platform, the cooling performance of the closed-cycle attoDRY1000 is outstanding. Temperatures as low as 3 K and probe cooldown times as fast as 1 hour make cryogenic scanning probe experiments a delight.
1 for routine variable temperature measurements, the closed-cycle cryostat attoDRY2100 with field cooling-capabilities is strongly recommended.
- General Specifications
- technology : ultra-low vibration, pulse-tube based closed-cycle cryostat, designed for confocal microscopy
- sample environment : He exchange gas, 4-5 different pressure ranges depending on desired sample temperature, requires manual control
- sample space : 49.7 mm diameter probe bore fitting all attocube inserts
- sample exchange : top loading system for quick access, Manual gas handling
- vibration & acoustic noise damping system : proprietary low vibration design
- Performance Data
- temperature control : Manual, requires optional temperature controller
- temperature range : 4 .. 80 K (guaranteed), 4 .. 300 K (expected); optional temp. controller required
- base temperature : 4 K (guaranteed), 3.2 (expected)
- magnetic field control : manual control via magnet power supply, via remote control
- Max. magnetic field : 100 % (e.g. 9 T) @ 4 .. 10 K sample temperature, 67% (e.g. 6 T out of 9 T) @ 10 .. 300 K sample temp
- cool down time of sample : approx. 2 h (depending on insert)
- cool down time of system (system incl. 9 T magnet) : approx. 10 .. 15 h (unattended)
- cool down time of system (system without magnet) : approx. 5 .. 10 h (unattended)
- temperature stability : < ± 10 mK expected (4 .. 50 K), < ± 25 mK guaranteed (4 .. 50 K)
- cooling power at sample location : > 5 mW @ 5 K
- Closed-Cycle Cooler
- field cooling possible : no
- nominal cooling power : > 900 mW @ 4.2 K
- power consumption : max. 9.0 kW, 7.2 kW steady state
- cooling of compressor : water cooling (requires local infrastructure)
- Size and Dimensions
- cryostat (width x depth x height) : 1120 x 640 x 1050 mm³ (depending on magnet choice)
- required min. ceiling height : approx. 2.60 m ( depending on magnet)
- optional electronics rack (width x depth x height) : 640 x 640 x 1050 mm³
- Options and Upgrades
- superconducting magnet : solenoids: 7, 9, 12 T, vector magnets: e.g.: 8/2 T, 9/3 T, 9/1/1 T, ...
- bipolar magnet power supply : included (with optional magnet)
- temperature controller : 2 channel (magnet + sample temperature)
- pumping kit : turbomolecular pump with suitable backing pump for sample space preparation
- Compatibility
- confocal microscopes : attoCFM I, attoCFM II, attoCFM III, attoCFM IV
- confocal Raman microscopes : attoRAMAN