Welcome Geri (and Richard) I don�t have specific answers but I can share that each patient reacts a little differently to chemo and radiation. Hopefully Richard is being treated at a top rated hospital so that he is getting the best possible care. As far a what time of day for radiation, I�d ask the technicians what the least waiting time of day is. For me it was the first thing in the morning. By the afternoon all of the delays would compound such that waiting was longer. The radiation treatments do not cause any immediate tiredness so that he will be able to do some other things during the day. The latter weeks of treatments can be grueling so you would do well to prepare for a tired and cranky patient.

Let us know when you have questions. Please also keep in mind that some people get through treatments without major problems. I hope this is the case for you both.
Sometimes reading here can be a little depressing and lead you to believe that it is always really tough. Hang in there.