Barbagallo, C. Barriere, B.S. Clement, C.S. Duchesne, P. Gerard, R.L.A. Gerigk, F. Henry, J. Kaabi, W. Maurin, P.M. Olivier, G. Olry, G. Overstreet, S.A. Park, G.-T. Rimmer, R.A. Roset, S. Wang, H. Zomer, Z.F. JACoW Publishing Geneva, Switzerland 2673-5504 978-3-95450-234-9 10.18429/JACoW-SRF2023-WEPWB103 English 831-834 HOM cavity damping coupling simulation Contribution to a conference proceedings 2023 2023-09 https://doi.org/10.18429/JACoW-SRF2023-WEPWB103 https://jacow.org/srf2023/papers/wepwb103.pdf Superconducting Radio-Frequency (SRF) linac cryomodules are foreseen for the high-current multi-turn energy recovery linac PERLE (Powerful Energy Recovery Linac for Experiments). Coaxial higher order mode (HOM) couplers are the primary design choice to absorb beam-induced power and avoid beam instabilities. We have used 3D-printed and copper-coated HOM couplers for the prototyping and bench RF measurements on the copper PERLE cavities. We have started a collaboration with JLab and CERN on this effort. This paper presents electromagnetic simulations of the cavity HOM-damping performance on those couplers. Bench RF measurements of the HOMs on an 801.58 MHz 2-cell copper cavity performed at JLab are detailed. The results are compared to eigenmode simulations in CST to confirm the design. RF-thermal simulations are conducted to investigate if the studied HOM couplers undergo quenching.