{"id":77,"date":"2015-09-27T18:00:08","date_gmt":"2015-09-27T18:00:08","guid":{"rendered":"http:\/\/pfs.ipmu.jp\/blog\/?p=77"},"modified":"2019-05-28T03:10:56","modified_gmt":"2019-05-28T03:10:56","slug":"the-fiber-positionar-is-under-the-experiment-%e3%83%95%e3%82%a1%e3%82%a4%e3%83%90%e3%83%bc%e9%85%8d%e7%bd%ae%e3%82%b7%e3%82%b9%e3%83%86%e3%83%a0%e8%a9%a6%e9%a8%93%e4%b8%ad","status":"publish","type":"post","link":"https:\/\/pfs.naoj.org\/blog\/2015\/09\/p77","title":{"rendered":"The fiber positionar is under the experiment"},"content":{"rendered":"

One of the unique features of the PFS instrument is its multiplicity: Using\u00a02400 fibers, a number of spectra of stars and galaxies can be obtained\u00a0simultaneously. The actuator named \u201cCobra\u201d, which is comprised of two\u00a0motors, is used for moving each fiber to the position of an astronomical object\u00a0of interest on the focal plane.\u00a0The “patrol area”, where each fiber attached to Cobra can move around, is limited\u00a0nearby Cobra itself, but by populating the fibers and Cobras on the focal plane\u00a0rather uniformly, we can cover the entire field of view for observation.<\/p>\n

\"cobra\"<\/a>\u00a0(The fiber positionar “Cobra”)<\/p>\n

Having repeated prototyping, testing, and design updates for several years, we are\u00a0now having the actuator which not only meets functional and performance requirements\u00a0but also have long life time. Because we will operate 2400 Cobras simultaneously\u00a0in real observation, we are also testing them not only individually but also with\u00a0them integrated into a module. The picture below shows the module under tests\u00a0in the designated room cooled down to -5 degC (23 degF) simulating a similar\u00a0environment to that at Subaru Telescope.<\/p>\n

\"cobratest\"<\/a>\u00a0(The experiment under cooling chamber)<\/p>\n","protected":false},"excerpt":{"rendered":"

One of the unique features of the PFS instrument is its multiplicity: Using\u00a02400 fibers, a number of spectra of stars and galaxies can be obtained\u00a0simultaneously. The actuator named \u201cCobra\u201d, which is comprised of two\u00a0motors, is used for moving each fiber to the position of an astronomical object\u00a0of interest on the focal plane.\u00a0The “patrol area”, where each fiber attached to Cobra… Read more »<\/a><\/p>\n","protected":false},"author":3,"featured_media":89,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_locale":"en_US","_original_post":"77","footnotes":""},"categories":[2],"tags":[6],"class_list":["post-77","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-development","tag-cobra","en-US"],"_links":{"self":[{"href":"https:\/\/pfs.naoj.org\/blog\/wp-json\/wp\/v2\/posts\/77","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pfs.naoj.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pfs.naoj.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pfs.naoj.org\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/pfs.naoj.org\/blog\/wp-json\/wp\/v2\/comments?post=77"}],"version-history":[{"count":18,"href":"https:\/\/pfs.naoj.org\/blog\/wp-json\/wp\/v2\/posts\/77\/revisions"}],"predecessor-version":[{"id":1337,"href":"https:\/\/pfs.naoj.org\/blog\/wp-json\/wp\/v2\/posts\/77\/revisions\/1337"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pfs.naoj.org\/blog\/wp-json\/wp\/v2\/media\/89"}],"wp:attachment":[{"href":"https:\/\/pfs.naoj.org\/blog\/wp-json\/wp\/v2\/media?parent=77"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pfs.naoj.org\/blog\/wp-json\/wp\/v2\/categories?post=77"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pfs.naoj.org\/blog\/wp-json\/wp\/v2\/tags?post=77"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}