University of Wisconsin-Madison Physical Sciences Lab

Archive for March, 2013

PSL keeps hot things hot.

Friday, March 22nd, 2013

Picture of Heat Control

PSL was asked to assemble four temperature control boxes. The boxes maintain the temperature of a water bath by switching power on and off. These boxes are based off a unit that had malfunctioned, and the parts were supplied to PSL to assemble. The cases needed modification, so they were sent to our machine shop for the necessary holes and cut-outs. PSL Technician Andy Arbuckle then assembled the cases, and soldered all of the interior connections.

Picture of the back of four heat controllers.

Higgs Boson Confirmation

Friday, March 15th, 2013

Photo of CMS disk being lowered into CMS cavern

Physicists working with the Large Hadron Collider have confirmed they have found the Higgs boson, the missing piece in Standard Model of Physics. Using the ATLAS and Compact Muon Solenoid experiments, scientists have amassed two and a half times as much data as they had when they announced they were 99% sure that they had found it in July of 2012.

Centrifuge Calibration

Friday, March 8th, 2013

PSL’s expertise goes beyond engineering big projects, to helping labs on campus with technical issues that do not require engineering support.

Andy Arbuckle checked the calibration of 44 centrifuges at the Wisconsin State Laboratory of Hygiene.  The centrifuges were from 10 different manufacturers and ranged from small bench top units to large floor models.  Andy used a PSL laser tachometer to measure the rotational speed of each centrifuge and determine if the set speed was within ± 5% of the measured value (as required by SLH). He found that all centrifuges were within ± 5% of the set speed with most being  ±1% or less.