Answer :
Final answer:
A Helium leak detector works by injecting gaseous helium into the system and using a heated filament to ionize helium atoms, which, when detected by a mass spectrometer, indicate a leak. So the correct option is: a) Helium leak detector
Explanation:
The type of leak detector that works by drawing the vapor into the system and heating it is the Helium leak detector. This detection method involves injecting a small amount of gaseous helium into a compartment of the system, such as a dilution refrigerator. An adjacent compartment is then connected to a high-vacuum pump with a mass spectrometer attached. A heated filament ionizes any helium atoms evacuated by the pump, and the detection of these ions by the spectrometer indicates a leak between the two compartments.
