Kiy, S. Baartman, R.A. Kester, O.K. Shelbaya, O. JACoW Publishing Geneva, Switzerland 2673-5547 978-3-95450-240-0 10.18429/JACoW-HIAT2022-TUP19 English 113-117 cavity linac ISAC controls solenoid Contribution to a conference proceedings 2022 2022-08 https://doi.org/10.18429/JACoW-HIAT2022-TUP19 https://jacow.org/hiat2022/papers/tup19.pdf As the e-linac and ARIEL facilities at TRIUMF progress, the impending complexity of operating three simultaneous rare ion beams (RIBs) approaches. To help prepare for this, a framework for the development of High Level Applications has been constucted, upon which multiple avenues for improvement towards model-based and automated tuning are being pursued. Along one of these avenues, the 40-cavity superconducting ISAC-II heavy ion linac has been studied and modelled in the envelope code transoptr. This has allowed for real-time integration through the on-axis fields, fitting focal strengths of solenoids to achieve desired beam waists, and calculation of necessary cavity phases to achieve a desired output energy for given input beam parameters. Initial tests have been completed, successfully phasing up to 37 cavities using the transoptr model and achieving a final output energy within 1% of the expected while maintaining nominal (>90%) transmission. A summary of the calibration of the model to the machine is given, followed by results of the phasing tests and an outlook towards future improvements.