Just need to add that the support you can receive as the wife would be Al-Anon or any 12 step group of people in recovery for the effects of addicts in their lives.
I have been attending Nar-Anon recently, after 15 years in Al-Anon, and that someone is in prison no longer shocks me, as there are many members in my Nar-Anon group whose sons, daughters, spouses are in prison or just being released. Drugs are illegal. It is an addiction that sends people to prison. In 15 years of Al-Anon I never heard the word "prison", but in Nar-Anon it is very common.
Going to prison is not a sacrifice for him, I want to be sure my post is clearer about that. It is a consequence.
Separation from him is the sacrifice for you. But such experiences can truly help us grow spiritually and that can be the hidden blessing.
He has his own battles to fight. You will be all right during the separation and can even bloom if you pursue your own spiritual growth.