Regular expression in jmeter

I have a scenario where i'm getting values for a request in the header

Response headers:
HTTP/1.1 302 Moved Temporarily
Server: Apache
X-Powered-By: Servlet 2.4; JBoss-4.3.0.GA_CP02 (build:
SVNTag=JBPAPP_4_3_0_GA_CP02 date=200808051050)/JBossWeb-2.0
x-wily-info: Clear guid=63C4869C0A07194D00C5AC0C23205359
x-wily-servlet: Clear
appServerIp=10.7.25.77樇Ꞵ횦=STG-portal-1뇪橧=ControllerServlet樇Ꞵ稬=vm0109ussac1樇Ꞵ﫨燫=JBoss
Location:
https://test-www.nike.net/portal/site/nike/template.PAGE/;jsessionid=9rU1wzkHOBC7skzvqr9FIg**.node1

I need to use regular expression and i have used regular expression for
jsession id

jsessionid=([^"]+?)

where do i see whether it is capturing or not