Principle

In cryo configuration, a copper cold finger is mounted on the sample stage and linked via copper braids to the cooled base plate of the LN2 dewar. The cold finger is thermally insulated from the sample stage mechanics by a Polyetheretherketone (PEEK) support. Measurements both in fluorescence and transmission modes are possible thanks to this new configuration. Good thermal contact is ensured due to the conical shapes of the cold finger and sample holder. Initial cooling of the cryo-stage requires 1 hour before settling in thermal equilibrium with a 100 K temperature on the cold finger.  The system offers an autonomy of 3.5 hours and a semi-automatic refilling procedure can be manually activated or integrated in data acquisition macros.