<html><body><div style="font-family: tahoma,new york,times,serif; font-size: 14pt; color: #009900"><div>hmm! looks like you guys have gone overboard robing the box!<br></div><div>has more robe than Rodolfo Acquaviva.<br data-mce-bogus="1"></div><div>good job!<br data-mce-bogus="1"></div><div><br></div><hr id="zwchr" data-marker="__DIVIDER__"><div data-marker="__HEADERS__"><b>From: </b>"Tyler Lemon" <tlemon@jlab.org><br><b>To: </b>"dsg-rich" <dsg-rich@jlab.org><br><b>Sent: </b>Monday, July 17, 2017 4:22:01 PM<br><b>Subject: </b>[Dsg-rich] Reflectivity test stand dark box modified to fit RICH mirrors<br></div><div><br></div><div data-marker="__QUOTED_TEXT__"><div style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000" data-mce-style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000;"><div>Hello,<br></div><br><div>Marc, Brian, Pablo, and I have modified the reflectivity test stand's dark box to make it taller. It is now big enough to allow RICH spherical mirrors to be tested.<br></div><br><div>We extended the vertical supports to make the dark box taller, used Tedlar/Mylar sheet and tape to cover the gaps caused by making the box taller, and added extra fabric to make it more light-tight. Attached is a picture of the taller dark box with the extra fabric.<br></div><br><div>Both photodiodes inside the taller dark box measure ~1 pA. This measurement is close what was measured before we modified the dark box.<br></div><br><div>We will continue tomorrow with the stability tests that Marco Mirazita recommended.<br></div><br><div>Best regards,<br></div><div>Tyler<br></div></div><br>_______________________________________________<br>Dsg-rich mailing list<br>Dsg-rich@jlab.org<br>https://mailman.jlab.org/mailman/listinfo/dsg-rich<br></div></div></body></html>