Question 2603
{"accessible":false,"alternatives":[{"id":12774,"text":"air cooling"},{"id":12775,"text":"conduction"},{"id":12776,"text":"convection"},{"id":12777,"text":"radiation"}],"archived":false,"correctAlternativeId":12777,"explanation":"\u003cp\u003eElectrons bombarding the anode create both heat and electromagnetic radiation (in the form of x-rays). The anode needs to tolerate this heat.\u003c/p\u003e\u003cp\u003eThe primary mechanism for heat removal from the actual focal spot is radiation. The anode is within a vacuum so there is no convection from the anode surface. The anode both will also remove some heat via conduction - this is the secondary heat removal mechanism.\u003c/p\u003e","id":2603,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2737","nextQuestionPath":"/articles/anode-x-ray-tube/questions/625","relatedArticles":[],"alsoUsedIn":[{"id":1551,"kind":"RestrictedPage","title":"Page 1551 (in no courses)","link":"https://radiopaedia.org/admin/restricted_pages/1551"},{"id":1995,"kind":"Course","title":"Imaging Physics: X-ray peer review - page 1995","link":"https://radiopaedia.org/courses/imaging-physics-x-ray-peer-review/pages/1995"},{"id":1995,"kind":"Course","title":"Imaging Physics: X-ray - page 1995","link":"https://radiopaedia.org/courses/imaging-physics-x-ray/pages/1995"}],"stem":"\u003cp\u003eWhat is the primary mechanism for heat removal from the actual focal spot on the anode in the x-ray tube?\u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/2603"}],"attemptsPercentages":[{"alternativeId":"12775","percentage":19},{"alternativeId":"12774","percentage":4},{"alternativeId":"12776","percentage":9},{"alternativeId":"12777","percentage":68}],"promptToLogin":false,"questionManager":false,"articleId":"anode-x-ray-tube"}