2.10.16

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DW THE DAILY WILDCAT WHAT’S INSIDE

NEWS: Meet your ASUA presidential candidates, p. 4

ARTS & LIFE:

UA alumus and Hollywood producer shows us “How to be Single”, p. 12

SCIENCE: Public

health emergency persists as Zika continues to spread, p. 6

WEDNESDAY  THURSDAY, FEBRUARY 10 11, 2016 | DAILYWILDCAT.COM |

DAILYWILDCAT |

/DAILYWILDCAT

SCIENCE

It’s all about the curves in mirror lab BY NATALIE ROBBINS

The Daily Wildcat

Most people would never guess that housed on the east side of Arizona Stadium is the Richard F. Caris Mirror Laboratory. Funneling into ZonaZoo, students pass by the mirror lab each football Saturday, and many may wonder about the work that goes on at the mirror lab, and about those who work there. The mirror lab team is made up of experts from many disciplines, including scientists, engineers and technicians, all working on an impressive new way to cast and polish mirrors to be used in telescopes. Sitting on air pads to reduce vibrations from passing traffic or seismic activity, the lab is both a design and manufacturing facility for the lightweight, honeycomb-shaped telescope mirrors.

The polishing team at the lab is continually working on new ways to achieve high accuracy of polishing on the deep curves required for the mirrors they make. For the 8.4 meter mirrors they make at the lab—the largest in the world—the accuracy of the polishing has to be within 100 nanometers. “Imagine the whole mirror scaled up to the size of continental North America, then the highest bump is 1 inch high,” said Hubert “Buddy” Martin, the project scientist for the polishing team at the mirror lab. “It expands the whole continent, and the highest bump is an inch high and the lowest valley, the Grand Canyon, is an inch deep.” This polishing precision is especially important for the creation of the Giant Magellan Telescope. The six outside mirrors of the telescope are aspherical, with a shape designed specially to focus incoming light from the stars.

The polishing process involves two parts: a diamond-generated shaping followed by a trip to the polishing cell, which shapes the mirror at an even more precise scale. Optical engineer Jonathan Davis was the lead project engineer in charge of rebuilding the diamond-generating machine, which is currently in the final process of the super-fine finish on mirror three for the Giant Magellan Telescope. “The diamond wheels on this spin at about 1100 revolutions per minute and basically they erode away the glass,” Davis said. Zooming in Davis has been working at the lab for 11 years. He first came to UA after he discovered the

MIRROR LABS, 9

SPORTS

KYLE FOGG MAKING A NAME The former Arizona guard has become accustomed to putting up staggering numbers in Europe, but is also making noise with his performance off the court, p. 16

SPORTS:

Football prepares for start of spring practice later this week, p. 18

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DAILYWILDCAT C M Let’s talk about sex and love, baby, in our Sex & Love issue coming for you this Friday. Read online and in print.


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2.10.16 by Arizona Daily Wildcat - Issuu