Vibrator unit and target supply device

A vibrator configured to vibrate a target material in a target channel, comprising:

• a vibration element configured to vibrate in response to an external electrical signal having a predetermined frequency, a resonance frequency of the vibration element being different from the predetermined frequency of the electrical signal;
• a vibration transmission member configured to be in contact with the vibration element and a first member including the target channel in the interior and transfer vibration of the vibration element to the first member;
• a second elastic section configured to apply pressure pushing the vibration element against the vibration transmission member;
• and
• a second adjuster configured to adjust the pressure from the second elastic section to the vibration element.