Swinson, C. Fedurin, M.G. Palmer, M.A. Pogorelsky, I. JACoW Geneva, Switzerland 978-3-95450-192-2 10.18429/JACoW-IBIC2017-MOPWC05 English 109-111 MOPWC05 ion laser electron cavity experiment Contribution to a conference proceedings 2018 2018-03 https://doi.org/10.18429/JACoW-IBIC2017-MOPWC05 http://jacow.org/ibic2017/papers/mopwc05.pdf The Accelerator Test Facility (ATF) at Brookhaven National Lab is an Office of Science user facility focusing on advanced acceleration techniques. It houses several electron beamlines synchronized to high power lasers, including a TW-class carbon dioxide (10 micron) laser. Here we outline ongoing upgrades to both the accelerator and laser systems, give a brief overview of the experimental landscape, and report on the recent commissioning of a newly installed X-band deflector cavity [1]. The deflector cavity is implemented as a longitudinal electron beam diagnostic, which will allow us to measure the structure of ultra-short bunches.