A transformer with an associated heat-dissipating plastic element is provided. In one or more implementations, the sample introduction system includes a sample pump configured to pump a sample in a specified time interval and a first carrier syringe pump configured to pump a volume of a carrier to be combined with the sample in the specified time interval. Cryocooler andor cooling fan enter low power mode when dewar liquid level reaches a predetermined level, and to return to a fall power mode when dewar liquid level drops to another predetermined level.