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.
|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|
|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|
|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|
|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|
|confocal microscopes||attoCFM I, attoCFM II, attoCFM III, attoCFM IV|
|confocal Raman microscopes||attoRAMAN|
Fields of Applications
Imaging and scanning probe microscopy of surface properties on the nanoscale at variable temperatures down to milli Kelvin and combination with high magnetic fields.
Magnetotransport measurements on mesoscopic structures at variable temperatures and in high magnetic fields.
Optics and Spectroscopy
Confocal microscopy and nanoscale spectroscopy at low temperatures and in high magnetic fields on quantum dots, NV centers, 2D materials, nanowires and other materials.
Systems for microscopy and nanoscale analysis of material properties at ambient and low temperature and in high magnetic fields.
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.