{"id":6222,"date":"2013-06-26T22:39:08","date_gmt":"2013-06-27T02:39:08","guid":{"rendered":"http:\/\/droppingballast.com\/?p=6222"},"modified":"2013-06-26T22:39:34","modified_gmt":"2013-06-27T02:39:34","slug":"liquid-helium-computer-mods","status":"publish","type":"post","link":"http:\/\/droppingballast.com\/?p=6222","title":{"rendered":"Liquid Helium, Computer Mods"},"content":{"rendered":"<p>Yesterday, Team Cryo started filling Theo with liquid helium. This is where the operation is most &#8220;cryogenically interesting&#8221;, which is a euphemism for mysterious and scary. Things that you don&#8217;t fully understand (especially now with several more telescopes installed), but can potentially cause a lot of damage. At least they happen slowly, so that you have lots of time to get tired.<\/p>\n<p>I&#8217;ve mostly been working on modifications to the flight computer box, with the help of Jamil and Ed. Due to somewhat high priority, I didn&#8217;t take as much time for photography as usual.<\/p>\n<!-- Awesome Flickr Gallery Start --><!-- - Version - 3.5.6 - User ID - 27717602@N03 - Photoset ID - 72157634346673421 - Gallery ID -  - Group ID -  - Tags -  - Popular -  - Per Page - 100 - Sort Order - flickr - Photo Size - _m - Custom Size - 0 - Square - false - Captions - on - Description - on - Columns - 3 - Credit Note - off - Background Color - Transparent - Width - auto - Pagination - on - Slideshow - flickr - Disable slideshow? - --><div class='afg-gallery custom-gallery-75' id='afg-75' style='background-color:Transparent; width:100%; color:; border-color:Transparent;'><div class='afg-table' style='width:100%'><div class='afg-row'><div class='afg-cell' style='width:33%;'><a   target='_blank' href='https:\/\/www.flickr.com\/photos\/27717602@N03\/9146511045' title='Sunset over the launchpad'><img class='afg-img' title='Sunset over the launchpad' src='https:\/\/farm8.static.flickr.com\/7339\/9146511045_2ca2cefd0f_m.jpg' alt='Sunset over the launchpad \u2022 &lt;a style=&quot;font-size:0.8em;&quot; href=&quot;http:\/\/www.flickr.com\/photos\/27717602@N03\/9146511045\/&quot; target=&quot;_blank&quot;&gt;View on Flickr&lt;\/a&gt;'\/><\/a><div class='afg-title' style='font-size:1em'>Sunset over the launchpad <\/div><div class='afg-description'>With fresh bales of hay. I didn't make it back outside in time for the disc of the sun to remain up<\/div><\/div><div class='afg-cell' style='width:33%;'><a   target='_blank' href='https:\/\/www.flickr.com\/photos\/27717602@N03\/9146511471' title='New holes'><img class='afg-img' title='New holes' src='https:\/\/farm4.static.flickr.com\/3769\/9146511471_6375512849_m.jpg' alt='New holes \u2022 &lt;a style=&quot;font-size:0.8em;&quot; href=&quot;http:\/\/www.flickr.com\/photos\/27717602@N03\/9146511471\/&quot; target=&quot;_blank&quot;&gt;View on Flickr&lt;\/a&gt;'\/><\/a><div class='afg-title' style='font-size:1em'>New holes <\/div><div class='afg-description'>Expertly cut in the computer box<\/div><\/div><div class='afg-cell' style='width:33%;'><a   target='_blank' href='https:\/\/www.flickr.com\/photos\/27717602@N03\/9148739482' title='Jamil cleans a computer'><img class='afg-img' title='Jamil cleans a computer' src='https:\/\/farm3.static.flickr.com\/2875\/9148739482_26d493b2b4_m.jpg' alt='Jamil cleans a computer \u2022 &lt;a style=&quot;font-size:0.8em;&quot; href=&quot;http:\/\/www.flickr.com\/photos\/27717602@N03\/9148739482\/&quot; target=&quot;_blank&quot;&gt;View on Flickr&lt;\/a&gt;'\/><\/a><div class='afg-title' style='font-size:1em'>Jamil cleans a computer <\/div><div class='afg-description'>Removing metal shavings around new holes. Computers don't get along with metal shavings<\/div><\/div><\/div><div class='afg-row'><div class='afg-cell' style='width:33%;'><a   target='_blank' href='https:\/\/www.flickr.com\/photos\/27717602@N03\/9148739930' title='Board mods'><img class='afg-img' title='Board mods' src='https:\/\/farm8.static.flickr.com\/7339\/9148739930_492bdd68cc_m.jpg' alt='Board mods \u2022 &lt;a style=&quot;font-size:0.8em;&quot; href=&quot;http:\/\/www.flickr.com\/photos\/27717602@N03\/9148739930\/&quot; target=&quot;_blank&quot;&gt;View on Flickr&lt;\/a&gt;'\/><\/a><div class='afg-title' style='font-size:1em'>Board mods <\/div><div class='afg-description'>on the hidden underside of the computer watchdog<\/div><\/div><div class='afg-cell' style='width:33%;'><a   target='_blank' href='https:\/\/www.flickr.com\/photos\/27717602@N03\/9148740454' title='Helium'><img class='afg-img' title='Helium' src='https:\/\/farm8.static.flickr.com\/7398\/9148740454_e589554f64_m.jpg' alt='Helium \u2022 &lt;a style=&quot;font-size:0.8em;&quot; href=&quot;http:\/\/www.flickr.com\/photos\/27717602@N03\/9148740454\/&quot; target=&quot;_blank&quot;&gt;View on Flickr&lt;\/a&gt;'\/><\/a><div class='afg-title' style='font-size:1em'>Helium <\/div><div class='afg-description'>Refrigerated liquid<\/div><\/div><div class='afg-cell' style='width:33%;'><a   target='_blank' href='https:\/\/www.flickr.com\/photos\/27717602@N03\/9146513489' title='Jon inserts the fill tube into the dewar'><img class='afg-img' title='Jon inserts the fill tube into the dewar' src='https:\/\/farm6.static.flickr.com\/5338\/9146513489_18b2d8cc12_m.jpg' alt='Jon inserts the fill tube into the dewar \u2022 &lt;a style=&quot;font-size:0.8em;&quot; href=&quot;http:\/\/www.flickr.com\/photos\/27717602@N03\/9146513489\/&quot; target=&quot;_blank&quot;&gt;View on Flickr&lt;\/a&gt;'\/><\/a><div class='afg-title' style='font-size:1em'>Jon inserts the fill tube into the dewar <\/div><div class='afg-description'><\/div><\/div><\/div><div class='afg-row'><div class='afg-cell' style='width:33%;'><a   target='_blank' href='https:\/\/www.flickr.com\/photos\/27717602@N03\/9148741402' title='Becky feels for venting gas at the other end'><img class='afg-img' title='Becky feels for venting gas at the other end' src='https:\/\/farm8.static.flickr.com\/7449\/9148741402_a06f8c01ac_m.jpg' alt='Becky feels for venting gas at the other end \u2022 &lt;a style=&quot;font-size:0.8em;&quot; href=&quot;http:\/\/www.flickr.com\/photos\/27717602@N03\/9148741402\/&quot; target=&quot;_blank&quot;&gt;View on Flickr&lt;\/a&gt;'\/><\/a><div class='afg-title' style='font-size:1em'>Becky feels for venting gas at the other end <\/div><div class='afg-description'>Low tech<\/div><\/div><div class='afg-cell' style='width:33%;'><a   target='_blank' href='https:\/\/www.flickr.com\/photos\/27717602@N03\/9148741802' title='Venting gas'><img class='afg-img' title='Venting gas' src='https:\/\/farm4.static.flickr.com\/3828\/9148741802_a1cb383c1c_m.jpg' alt='Venting gas \u2022 &lt;a style=&quot;font-size:0.8em;&quot; href=&quot;http:\/\/www.flickr.com\/photos\/27717602@N03\/9148741802\/&quot; target=&quot;_blank&quot;&gt;View on Flickr&lt;\/a&gt;'\/><\/a><div class='afg-title' style='font-size:1em'>Venting gas <\/div><div class='afg-description'>And ice on the plumbing<\/div><\/div><div class='afg-cell' style='width:33%;'><a   target='_blank' href='https:\/\/www.flickr.com\/photos\/27717602@N03\/9146514711' title='Jon watches'><img class='afg-img' title='Jon watches' src='https:\/\/farm4.static.flickr.com\/3773\/9146514711_754b05ea8a_m.jpg' alt='Jon watches \u2022 &lt;a style=&quot;font-size:0.8em;&quot; href=&quot;http:\/\/www.flickr.com\/photos\/27717602@N03\/9146514711\/&quot; target=&quot;_blank&quot;&gt;View on Flickr&lt;\/a&gt;'\/><\/a><div class='afg-title' style='font-size:1em'>Jon watches <\/div><div class='afg-description'>Cryo people must be watchful<\/div><\/div><\/div><div class='afg-row'><div class='afg-cell' style='width:33%;'><a   target='_blank' href='https:\/\/www.flickr.com\/photos\/27717602@N03\/9148742720' title='Flingle 3'><img class='afg-img' title='Flingle 3' src='https:\/\/farm8.static.flickr.com\/7383\/9148742720_e4a61388de_m.jpg' alt='Flingle 3 \u2022 &lt;a style=&quot;font-size:0.8em;&quot; href=&quot;http:\/\/www.flickr.com\/photos\/27717602@N03\/9148742720\/&quot; target=&quot;_blank&quot;&gt;View on Flickr&lt;\/a&gt;'\/><\/a><div class='afg-title' style='font-size:1em'>Flingle 3 <\/div><div class='afg-description'>The latest 3D-printed creation. Still awesome (Plus &quot;Come and Take It&quot;)<\/div><\/div><div class='afg-cell' style='width:33%;'><a   target='_blank' href='https:\/\/www.flickr.com\/photos\/27717602@N03\/9146515641' title='Star camera baffles'><img class='afg-img' title='Star camera baffles' src='https:\/\/farm6.static.flickr.com\/5465\/9146515641_ba99e91fb8_m.jpg' alt='Star camera baffles \u2022 &lt;a style=&quot;font-size:0.8em;&quot; href=&quot;http:\/\/www.flickr.com\/photos\/27717602@N03\/9146515641\/&quot; target=&quot;_blank&quot;&gt;View on Flickr&lt;\/a&gt;'\/><\/a><div class='afg-title' style='font-size:1em'>Star camera baffles <\/div><div class='afg-description'>Uncovered, so ineffective at blocking light, but much more interesting to look at<\/div><\/div><div class='afg-cell' style='width:33%;'><a   target='_blank' href='https:\/\/www.flickr.com\/photos\/27717602@N03\/9148743674' title='Bill waits for the fill tube to cool'><img class='afg-img' title='Bill waits for the fill tube to cool' src='https:\/\/farm6.static.flickr.com\/5341\/9148743674_575719d9fd_m.jpg' alt='Bill waits for the fill tube to cool \u2022 &lt;a style=&quot;font-size:0.8em;&quot; href=&quot;http:\/\/www.flickr.com\/photos\/27717602@N03\/9148743674\/&quot; target=&quot;_blank&quot;&gt;View on Flickr&lt;\/a&gt;'\/><\/a><div class='afg-title' style='font-size:1em'>Bill waits for the fill tube to cool <\/div><div class='afg-description'>On another helium fill later in the day<\/div><\/div><\/div><div class='afg-row'><div class='afg-cell' style='width:33%;'><a   target='_blank' href='https:\/\/www.flickr.com\/photos\/27717602@N03\/9146516561' title='Becky works on the rotating polarized (microwave) source'><img class='afg-img' title='Becky works on the rotating polarized (microwave) source' src='https:\/\/farm3.static.flickr.com\/2845\/9146516561_23d8980efd_m.jpg' alt='Becky works on the rotating polarized (microwave) source \u2022 &lt;a style=&quot;font-size:0.8em;&quot; href=&quot;http:\/\/www.flickr.com\/photos\/27717602@N03\/9146516561\/&quot; target=&quot;_blank&quot;&gt;View on Flickr&lt;\/a&gt;'\/><\/a><div class='afg-title' style='font-size:1em'>Becky works on the rotating polarized (microwave) source <\/div><div class='afg-description'>Which will be a useful tool in the calibration work that will come up soon<\/div><\/div><div class='afg-cell' style='width:33%;'><a   target='_blank' href='https:\/\/www.flickr.com\/photos\/27717602@N03\/9146517029' title='Reassembled computer box'><img class='afg-img' title='Reassembled computer box' src='https:\/\/farm8.static.flickr.com\/7343\/9146517029_9f8cd312f8_m.jpg' alt='Reassembled computer box \u2022 &lt;a style=&quot;font-size:0.8em;&quot; href=&quot;http:\/\/www.flickr.com\/photos\/27717602@N03\/9146517029\/&quot; target=&quot;_blank&quot;&gt;View on Flickr&lt;\/a&gt;'\/><\/a><div class='afg-title' style='font-size:1em'>Reassembled computer box <\/div><div class='afg-description'>Now with slightly moved contents. And &quot;speed holes&quot;. To make it &quot;faster&quot;<\/div><\/div><div class='afg-cell' style='width:33%;'><a   target='_blank' href='https:\/\/www.flickr.com\/photos\/27717602@N03\/9148744986' title='Long night'><img class='afg-img' title='Long night' src='https:\/\/farm6.static.flickr.com\/5349\/9148744986_9987f41efe_m.jpg' alt='Long night \u2022 &lt;a style=&quot;font-size:0.8em;&quot; href=&quot;http:\/\/www.flickr.com\/photos\/27717602@N03\/9148744986\/&quot; target=&quot;_blank&quot;&gt;View on Flickr&lt;\/a&gt;'\/><\/a><div class='afg-title' style='font-size:1em'>Long night <\/div><div class='afg-description'>Science is: playing games while waiting for things to happen. After having been up all night waiting for things to happen<\/div><\/div><\/div><\/div><\/div><!-- Awesome Flickr Gallery End -->\n","protected":false},"excerpt":{"rendered":"<p><img decoding=\"async\" loading=\"lazy\" class=\"alignleft\" src=\"http:\/\/farm8.staticflickr.com\/7339\/9146511045_2ca2cefd0f_n.jpg\" width=\"320\" height=\"213\" alt=\"Sunset over the launchpad\"> Yesterday, Team Cryo started filling Theo with liquid helium. This is where the operation is most &#8220;cryogenically interesting&#8221;, which is a euphemism for mysterious and scary. Things that you don&#8217;t fully understand (especially now with several more telescopes installed), but can potentially cause a lot of damage. At least they happen slowly, so that you have lots of time to get tired. I&#8217;ve mostly been working on modifications to the flight computer box, with the help of Jamil and Ed. Due to somewhat high priority, I didn&#8217;t take as much time for photography as usual. [&#8230;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[16,8],"tags":[],"_links":{"self":[{"href":"http:\/\/droppingballast.com\/index.php?rest_route=\/wp\/v2\/posts\/6222"}],"collection":[{"href":"http:\/\/droppingballast.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/droppingballast.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/droppingballast.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/droppingballast.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6222"}],"version-history":[{"count":4,"href":"http:\/\/droppingballast.com\/index.php?rest_route=\/wp\/v2\/posts\/6222\/revisions"}],"predecessor-version":[{"id":6226,"href":"http:\/\/droppingballast.com\/index.php?rest_route=\/wp\/v2\/posts\/6222\/revisions\/6226"}],"wp:attachment":[{"href":"http:\/\/droppingballast.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6222"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/droppingballast.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6222"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/droppingballast.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6222"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}