Linear substrate processing compartment

A linear compartment comprising:

• a processing barrel including an outer wall having opposing ends and a chamber defined therein, the processing barrel also having a linear substrate inlet into the chamber and a linear substrate outlet out of the chamber:
• an exposure gap defined between the linear substrate inlet and the linear substrate outlet,
• the processing barrel further including a fluid inlet and a fluid outlet in fluid communication with the chamber,
• the linear substrate inlet and the linear substrate outlet being coupled to the wall and being moveably connected with respect to each other, the linear substrate inlet and outlet being moveable between a plurality of relative positions each defining a different length of the exposure gap, the length of the exposure gap being reconfigurable from zero to greater than zero,
• in a first relative position one of the linear substrate inlet and outlet being located between the opposing ends of the wall and the exposure gap having a first length that is greater than zero, in the first relative position the exposure gap being in fluid communication with the chamber, and
• in a second relative position one of the linear substrate inlet and linear substrate outlet being in a different position than when in the first relative position, in the second relative position the exposure gap having a second length that is different from the first length,
• wherein the linear substrate inlet and the linear substrate outlet include seals.