BOULDER - Boulder County justice officials are taking a radical new approach to drug addiction, starting this fall. Addicts who violate probation by continuing to use drugs will be sent to drug court, rather than back to jail. They'll make some 40 appearances before a judge in a year, each time with a reward or a sanction on the line. A longtime addict making his first appearance might be rewarded with movie tickets just for showing up on time for the court date and bringing a urine sample, even if that sample shows he's still using. The aim is to close the revolving door that scoots drug addicts into jail, back into society and back again to jail. Drugs can be so addictive that it's unreasonable to expect an addict to quit them cold turkey, even if jail is the alternative, backers of the new approach say.