Thank you everyone for all the help. Gottfried – Thanks for the photo I will give this a try.
Best - Annette From: [email protected] [mailto:[email protected]] Sent: Friday, September 15, 2017 1:17 AM To: Annette Herta Erbse Subject: Re: [ccp4bb] ice build up during collection using 4 axis goniometer Dear Anette, appended is a photo of our AFC12 setup. I had to position the cryo coming almost directly from top to be able to use kappa to +- 60° and 2theta to -100°. With more hunidity in summer I do get some ice, but it is at the pin below the crystal. I have never ovserved a shadow from the ice on the detector and as omega proceeds old "beards" of ice melt away. More pictures only if you like, they are so big. Good luck Gottfried On Wednesday, 13-09-2017 at 21:54 Annette Herta Erbse wrote: Dear All, We have a Rigaku XtalLab with a MM003 generator, a 4 axis goniometer and an Oxford 700 cryostream. I have been running into the problem that if I make full use of the 4 axis goniometer in the collection strategy I run into geometries where the angles between the pin/Xtal and the Oxford cryo head nozzle are smaller than 90 0 and in these positions I start collecting a lot of ice to a point were it get's blown off by the cold stream and I have lost Xtals. I was wondering if others have experienced the same and if there is a good way to avoid it. At the moment I feel like I simply have to avoid these ranges which is a shame since it restricts the data collection strategy. I appreciate any advice - Annette
