Where do you have your coop located? My homesteader friend told me that it's important to have it in a place where the hawk does not have a clear flight path. Meaning, he can't swoop in & swoop out quickly - imagine an air plane landing/take off pattern. She said that if they don't have a clear space to fly in, they won't attack.
So, I have my coop between our garage and a medium sized tree that overhangs the run. We have had a red-tail hawk attack, but only when the chickens had escaped from their run and were roaming the neighbor's clear corn field. Maybe you could relocate your coop? So there won't be a clear path?
Funny, the chicken our hawk attacked escaped! I thought she was a gonner - all I found at first were lots of feathers - but a half hour later she showed up clucking alarmingly to be let back into her run & into the chicken house with the other chickens. She had major gashes around her neck area, but she healed.
I had never known the meaning of being called "chicken" before. Those chickens stayed in their coop for about 3 days! LOL!
The hawk hung around for a few days, but really, I don't think I've seen him again since then (he used to live in our back black cherry tree all summer). Either something happened to him unrelated, or he was scared off by my chicken that survived the attack! She is a pretty fearless hen. She can get aggressive, but not dangerously so.
Actually, she's only laying an egg a week (she's 2), so if you want her, I would be happy to give her to you. Not sure if she would help with your hawk problem, though. Plus we're pretty far away from you. She's my dominant hen. I've nicknamed her "lucky."