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low vibration, cryogen-free cryostats with optional superconducting magnets


The attoDRY1000 is a cryogen-free cooling system setting new performance benchmarks and making possible what was considered impossible only a few years ago. The attoDRY1000 was specifically designed to provide an ultra-low vibration measurement platform for cryogenic scanning probe experiments, without the need for liquid helium.


* Probe cooldown (CFM insert): ~1 hour
* No magnet: ~5 hours
* 9 T magnet: ~10 hours


* < +/- 2 mK (expected)

+ no liquid Helium needed
+ long measurement cycles
+ low vibrations
+ ‚set-and-forget‘ type of operation
+ large bore size and sample space
+ magnetic fields up to 9 T
+ compact instrumental design

+ scanning probe microscopy experiments in a cryogenfree, low vibration environment
+ fast exchange of samples and/or scanning probe tips
+ measurements at a broad range of temperature and magnetic field (optional) with highest stability

Due to a proprietary design, mechanical vibrations created by the pulse-tube coldhead are decoupled from the measurement platform, creating a peak-to-peak vibration amplitude of less than 4.2 nm (1) at the sample location. Despite the mechanical decoupling between coldhead and sample platform, the cooling performance of the attoDRY1000 is simply outstanding. Temperatures as low as 3.5 K (2) and probe cooldown times as fast as 1 hour (3) make cryogenic scanning probe experiments a delight. For the attoDRY1000, a wide variety of scanning probe microscopy inserts ranging from confocal (CFM) to magnetic force microscopy (MFM), as well as the probe station inserts (CPS) are available.

The standard closed-cycle system enables vibration-sensitive experiments in a temperature range from 4 K to 300 K. The optionally available microscope inserts are cooled by a controlled exchange gas atmosphere. Superconducting magnets up to 9 T are available as an option.

(1) measured in vertical direction using an attoAFMI at a bandwidth of 200 Hz
(2) measured at the 2nd stage platform/magnet
(3) measured using a standard confocal microscope insert

standard edition 4 .. 300 K
technology low vibration, pulse-tube based closed-cycle cryostat,
designed for scanning probe microscopy applications
material of body stainless steel and Aluminum
top loading system quick and easy sample exchange,
2”diameter probe bore fitting all attocube inserts
temperature range 4 .. 300 K
cool down time to 4 K (full assembly) depending on magnet
cool down time to < 5 K (CFM insert) depending on magnet
temperature stability

< +/- 5 mK (4 K..50 K; expected: < +/- 2 mK)
nominal cooling power (4.2 K) 1000 mW
power consumption max. 9.0 kW, steady state 7.2 kW
cooling water cooling
cryostat(width x depth x height) 640 x 640 x 1200 mm
vacuum pump flange and valve included
thermometry standard feedthrough included
superconducting magnet 3 .. 9 T
confocal microscopes attoCFM I, attoCFM II, attoCFM III
confocal Raman microscopes attoRAMAN
atomic/magnetic  force microcopes attoAFM I, attoMFM I, attoAFM III (on request)
scannning Hall probe microscopes attoSHPM
cryogenic probe station attoCPS I, attoCPS II

Prof. Alexander Högele
(Nanophotonics group at the Ludwig-Maximilians-University in Germany).

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.


Dr. Benito Alén Millán
(Molecular Beam Epitaxy group at the Instituto de Microelectrónica de Madrid).

Thanks to the cryogen free operation and superb mechanical and thermal stability, unattended data acquisition overnight had never been so easy. This is very desirable when we perform photon anti-bunching experiments on a single quantum dot. Without any special effort, we have observed that the dot luminescence intensity remains constant within 14 percent over ten hours.


MFM and AFM measurements in a cryogen-free environment.
In this measurement, attocube’s attoMFM Ixs within the attoDRY1000 was used to image the hexagonal vortex lattice of optimum doped Bi2Sr2CaCu2O8+δ (Bi-2212) at a temperature of 4.1 K and a magnetic field of 10 Gauss. The signal-to-noise is approx. 20:1.
The outstanding performance of the ultra-low vibration level of the pulse-tube cooler in combination with the high stability of the AFM module allows for ultra high resolution imaging of nm-features over a wide temperature range (< 4 K .. 300 K) without the need for liquid Helium.