{"id":831,"date":"2013-08-12T15:09:33","date_gmt":"2013-08-12T06:09:33","guid":{"rendered":"http:\/\/www.lookingatnothing.com\/?p=831"},"modified":"2013-12-14T15:36:05","modified_gmt":"2013-12-14T06:36:05","slug":"the-bonse-hart-instrument-works","status":"publish","type":"post","link":"https:\/\/lookingatnothing.com\/index.php\/archives\/831","title":{"rendered":"The Bonse Hart instrument works!"},"content":{"rendered":"

Ok, so let’s start with the disclaimer: very initial results (fresh off the instrument, hence the delay), and the primary beam intensity is still very, very weak (flux at sample position: ~5kHz, at 10% generator power). Background detection level is typically on the order of 1 Hz.<\/p>\n

\"Recorded<\/a>
Figure 1:<\/strong> Recorded at 30 kV, 10mA, using the collimation crystal<\/figcaption><\/figure>\n

Nevertheless, there is a beautiful spectrum from the first crystal, clearly separating molybdenum k-alpha 1 and k-alpha 2 excitations (Figure 1). Besides that, the scan from the second (analyser) crystal shows a very sharp direct beam profile. The rotation stage resolution appears to be a factor of 100 better than they need to be. All I can hope for now is that I can measure strongly scattering samples. Because with this beam intensity, anything less than that will be impossible to measure.<\/p>\n

\"Figure<\/a>
Figure 2:<\/strong> recorded using 50 kV, 10mA generator setting, showing narrow direct beam.<\/figcaption><\/figure>\n

Next, I may need to think of ways of improving the beam intensity. Starting with parallelisation optics may be a good idea, I also still have the option of changing the anode from point-focus to line-focus. Any comments or recommendations are —as always— very welcome!<\/p>\n","protected":false},"excerpt":{"rendered":"

Ok, so let’s start with the disclaimer: very initial results (fresh off the instrument, hence the delay), and the primary beam intensity is still very, […]<\/a><\/p>\n<\/div>","protected":false},"author":1,"featured_media":832,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"activitypub_content_warning":"","activitypub_content_visibility":"","activitypub_max_image_attachments":4,"activitypub_interaction_policy_quote":"anyone","activitypub_status":"","footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[62,1,145],"tags":[153,174,162],"class_list":["post-831","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ann","category-uncategorized","category-hardware","tag-bonse-hart","tag-instrument","tag-ultra-saxs"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/lookingatnothing.com\/wp-content\/uploads\/2013\/08\/scan004.png","jetpack_shortlink":"https:\/\/wp.me\/p1gZ2v-dp","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/lookingatnothing.com\/index.php\/wp-json\/wp\/v2\/posts\/831","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lookingatnothing.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lookingatnothing.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lookingatnothing.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lookingatnothing.com\/index.php\/wp-json\/wp\/v2\/comments?post=831"}],"version-history":[{"count":2,"href":"https:\/\/lookingatnothing.com\/index.php\/wp-json\/wp\/v2\/posts\/831\/revisions"}],"predecessor-version":[{"id":873,"href":"https:\/\/lookingatnothing.com\/index.php\/wp-json\/wp\/v2\/posts\/831\/revisions\/873"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lookingatnothing.com\/index.php\/wp-json\/wp\/v2\/media\/832"}],"wp:attachment":[{"href":"https:\/\/lookingatnothing.com\/index.php\/wp-json\/wp\/v2\/media?parent=831"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lookingatnothing.com\/index.php\/wp-json\/wp\/v2\/categories?post=831"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lookingatnothing.com\/index.php\/wp-json\/wp\/v2\/tags?post=831"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}