Cryogenic

Cryogenic

aNexus attoDRY1000 top-loading closed-cycle cryostats with superconducting magnet

aNexus attoDRY1000 is a closed-cycle cryostat that sets new performance benchmarks, specifically designed to provide an ultra-low vibration measurement platform for cryogenic confocal microscopy without the need for liquid helium. It offers a standard closed-cycle system for vibration-sensitive experiments with a temperature range from 4 K to 80 K, with the possibility of reaching higher temperatures through careful manual control of the pressure inside the cryostat.

The attoDRY1000 features a controlled exchange gas atmosphere that cools optional microscope inserts, making it compatible with confocal microscopy setups. Superconducting magnets with up to 9 T are available as an option, expanding the capabilities of the cryostat for experiments requiring magnetic fields. The proprietary design of the attoDRY1000 ensures mechanical decoupling of vibrations created by the pulse-tube coldhead from the measurement platform, minimizing vibration interference.

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, which is a small fraction of the spot size. The long-term stability and ultra-low drift in such experiments are further ensured by low temperature objectives and the rigid attoCFM I external optics head, enhancing the quality of measurements.

Despite the mechanical decoupling, the attoDRY1000 offers outstanding cooling performance, with temperatures as low as 3 K and probe cooldown times as fast as 1 hour, making it suitable for cryogenic scanning probe experiments. However, for routine variable temperature measurements, the closed-cycle cryostat attoDRY2100 with field cooling capabilities is strongly recommended, providing additional versatility for experimental needs.

Overall, the attoDRY1000 offers exceptional performance and capabilities for cryogenic confocal microscopy experiments, providing an ultra-low vibration measurement platform without the need for liquid helium, and making it a top choice for researchers in the field of quantum optics and scanning probe microscopy.