top-loading closed-cycle cryostats with superconducting magnet

cryogen-free & low vibration cryostat platform

no liquid helium required & enables SPM

toploading insert with 49.7 mm sample space

larger sample space than most competitors

low Temp. (4 K) & high magnetic fields (up to 12 T)

quantum optics & magneto-optics applications

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
technologyultra-low vibration, pulse-tube based closed-cycle cryostat, designed for confocal microscopy
sample environmentHe exchange gas, 4-5 different pressure ranges depending on desired sample temperature, requires manual control
sample space49.7 mm diameter probe bore fitting all attocube inserts
sample exchangetop loading system for quick access, Manual gas handling
vibration & acoustic noise damping systemproprietary low vibration design
Performance Data
temperature control Manual, requires optional temperature controller
temperature range4 .. 80 K (guaranteed), 4 .. 300 K (expected); optional temp. controller required
base temperature< 4 K
magnetic field controlmanual control via magnet power supply, via remote control
Max. magnetic field100 % (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 sampleapprox. 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 possibleno
nominal cooling power> 900 mW @ 4.2 K
power consumptionmax. 9.0 kW, 7.2 kW steady state
cooling of compressorwater 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 heightapprox. 2.60 m ( depending on magnet)
optional electronics rack (width x  depth x height)640 x 640 x 1050 mm³
Options and Upgrades
superconducting magnetsolenoids: 7, 9, 12 T, vector magnets: e.g.: 8/2 T, 9/3 T, 9/1/1 T, ...
bipolar magnet power supplyincluded (with optional magnet)
temperature controller2 channel (magnet + sample temperature)
pumping kitturbomolecular pump with suitable backing pump for sample space preparation
confocal microscopesattoCFM I, attoCFM II, attoCFM III, attoCFM IV
confocal Raman microscopesattoRAMAN
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Customer Feedback

Prof. A. Högele

Nanophotonics group, Ludwig-Maximilians-University Munich

The attoDRY1000 has quickly become an integral part of the research equipment in our group. The closed-cycle system is easy to operate while providing for excellent stability, short cool down times and low vibration level for optical spectroscopy of solid-state quantum systems. The compatibility with previous versions of CFM-line microscopes and the plug-and-play operation without cryogenic liquids make attoDRY1000 a really attractive alternative to conventional cryogenic spectroscopy in bath cryostat systems.

Prof. M. Atatüre

University of Cambridge, Department of Physics, UK

The delivery of the attoDRY1000 was well within the anticipated time frame, the installation was carried out successfully and since then, the system has given full satisfaction. All quoted specifications were fulfilled or exceeded and the service, maintenance and support have proven to be excellent. The unit has been operational since the first day and continues to function with no interruptions. I can verify that, in contrast to typical liquid systems, the attoDRY1000 continues to operate without the typical interruption of cryogenics refill, allowing data acquisition around the clock for months.

Dr. B. Alén Milán

Molecular Beam Epitaxy group, Instituto de Microelectrónica de Madrid

In contrast to many other such complex pieces of equipment, we were able to perform our first regular measurements already after 2 weeks, and since then, have been very pleased with the performance of the attoDRY1000.

Prof. M. Daldin

UFSCar, Universidade Federal de São Carlos, São Carlos, Brazil

Thanks to the versatility of the attoDRY1000 used with the attoCFMI, the system has been serving our research group in different kinds of optical and electronic transport measurements. It's incredible stability on a cryo-free enviroment is the key for succesfully running measurements over long periods of time. We are also very glad with the first class technical support provided by attocube.