Hi David.
Your problem is not uncommon.
With a situation like this it should be understood and dealt with properly., and of course legally.
First off , there are laws that protect the rights of people using radio transmitters. (YOU cant tell him to stop using it)
There are also laws and rights to those that wish to use radio and TV receivers.
You have to be careful that whatever you do it doesn't violate another persons legal rights , or it may be you that winds up before the judge.
CB radio operators operate legally under a class law.
The class law is their radio license.
To comply with their licenses obligations they must however comply with certain conditions.
One of these is output power levels.
For CB radio these power levels are quite low , and with normal use , CBs can be used with minimal or no interference problems to the neighbors.
Another licensing condition is that radios CANNOT be altered or modified in anyway.
Often though CB'rs adjust their radios for more power , and then use an external add-on amplifier.
As CBrs are not educated in radio electronics practice they are unaware that their adjustments don't make a lot of power , but instead causes huge interference problems.
These things are most definitely illegal , and in fact , it is a federal offense.
CBrs don't seem to respect the law though and the FCC receives thousands of complaints over CB interference every year.
While making a complaint to the FCC (if you reside in the USA) is one avenue you can take , you can always go the civil route through the courts if you can prove loss of income.
You must remember though that he is your neighbor and after all this you will still be living next to him.
Personally , I would first send him a registered letter (which he must sign for) written respectfully stating clearly the problem , its impact on your job and life, and request that he cleans up his transmitted signal so that the interference stops.
If nothing happens after a month , send another letter asking for action , being sure not to tell him top stop using the radio.
Remember to add that it is the interference that you want stopped, not him using his radio.
When there is still no action after another month you can write again saying that if the interference isn't ended after another month that the FCC will have to be notified.
If the FCC investigator does come , you can show copies of the letters which show that you have tried to resolve the problem.
This will go against the CBer even more and prove a deliberate intent to continue violating the law.
This being the case , radio equipment seizure is likely to happen , a substantial fine (usually between $1500 - $6000) will be incurred to the CBer and a record will be placed on his permanent police record.