Thursday, April 26 , 2018, 7:28 pm | Fair 58º


UCSB Researchers Craft Device to Help Blast Mysteries of the Universe

The team is assisting in history-making research to discover the nature of the origins of the universe.

Article Image
UCSB researcher Joseph Incandela inside the massive Large Hadron Collider, the world’s largest particle accelerator. (UCSB photo)

Three hundred feet below the ground in a tunnel that crosses between France and Switzerland, scientists are gearing up for the greatest physics experiment ever performed. The purpose? Nothing less than to discover the origins of the universe.

The experiment involves smashing subatomic particles together, in an effort to simulate the Big Bang — the model of the universe that says the universe came about through a huge explosion and has been expanding ever since.

Seventeen miles of underground tunnel have been modified to accommodate the Large Hadron Collider, the world’s largest particle accelerator. At one of the several intersection points along the way will be the portion that more than 40 faculty members, graduate students, postdoctoral researchers, engineers, technicians and undergraduates from UCSB have helped put together for eight years: the Compact Muon Solenoid.

The CMS is a particle detector aimed at what the scientists hope will be one of several collision sites. 

“When two protons collide with a lot of energy, new particles are produced,” said Claudio Campagnari, one of the researchers in the UCSB group. “In other words, the energy of the collision can be used to create particles according to Einstein’s famous equation, E=mc^2.”

The CMS is designed to track and image what particles come out of the collision. It is analogous to an enormous and powerful digital camera, according to David Stuart, another UCSB researcher.

“In fact, the devices use technology (silicon sensors) similar in concept to what is at the heart of a digital camera,” he said. “But, each individual piece is much bigger than a camera’s sensor, and there are thousands of them placed all around the collision point.”

By tracking the path these particles take when bent by the strong magnetic field around them, the scientists can determine what kind of particle they are,

“From the amount of bend, we can measure the velocity of the particles,” Campagnari said.

It’s not the prospect of seeing what the CMS can easily detect that intrigues the scientists who helped put together the CMS. It’s what doesn’t interact with light, and what hasn’t yet been directly observable.

Article Image
The Compact Muon Solenoid s a particle detector aimed at what the scientists hope will be one of several collision sites. (UCSB photo)
“For example, we know that some of the sub-atomic particles have mass, and indeed those masses have been precisely measured, but we have not yet convincingly explained what generates those masses,” Stuart said. The Higgs boson is an elementary particle that is still a theory, but one that has been widely accepted because of its ability to fill a rather large hole in the science of particle physics.

“You could say that the particles are part of a jigsaw puzzle. When you look at the properties of just some of the particles, you can tell that there are other particles missing,” researcher Jeff Richman said. By re-creating the Big Bang, the LHC will be able to create these so-called “God-particles” that have the ability to give these sub-atomic particles their mass.

If the scientists do find a particle after the billions of collisions per second that the CMS will be imaging, and determine it is indeed the Higgs boson, Scottish physicist Peter Higgs most likely would win the Nobel Prize, Richman said.

The collisions in the LHC are also predicted to create dark matter, matter that physicists believe makes up almost a quarter of the universe but remains invisible. In the closed environment of the particle accelerator, Stuart said, if the LHC does create dark matter, the CMS could show something about it.

It could take years, Richman said, “but we will get lots of data and, if we don’t observe the Higgs particle, we will conclude that either the particle does not exist or that it has properties that are different from what we expect.”

Despite all the time (15 years so far), money (about $10 billion) and even public outcry from people claiming that recreating the Big Bang will create tiny black holes that will gobble up the Earth (refuted by the American Physical Society and the LHC’s parent organization, CERN among others), the scientists remain excited about the prospects the collider offers when it performs its first experiments in a few weeks. The LHC powered up and sent a beam around for the first time last Wednesday.

“The reason that we are so interested in this particle is that it is part of a beautiful explanation that seems to make sense to us, but which is not yet proved,” Richman said. “This may not sound all that important. But mass is such a key property of matter that we really want to understand where it comes from.

“It won’t help anybody build a better mousetrap, but we will know a lot more about how the universe is put together.”

Noozhawk staff writer Sonia Fernandez can be reached at [email protected]

  • Ask
  • Vote
  • Investigate
  • Answer

Noozhawk Asks: What’s Your Question?

Welcome to Noozhawk Asks, a new feature in which you ask the questions, you help decide what Noozhawk investigates, and you work with us to find the answers.

Here’s how it works: You share your questions with us in the nearby box. In some cases, we may work with you to find the answers. In others, we may ask you to vote on your top choices to help us narrow the scope. And we’ll be regularly asking you for your feedback on a specific issue or topic.

We also expect to work together with the reader who asked the winning questions to find the answer together. Noozhawk’s objective is to come at questions from a place of curiosity and openness, and we believe a transparent collaboration is the key to achieve it.

The results of our investigation will be published here in this Noozhawk Asks section. Once or twice a month, we plan to do a review of what was asked and answered.

Thanks for asking!

Click Here to Get Started >

Support Noozhawk Today

You are an important ally in our mission to deliver clear, objective, high-quality professional news reporting for Santa Barbara, Goleta and the rest of Santa Barbara County. Join the Hawks Club today to help keep Noozhawk soaring.

We offer four membership levels: $5 a month, $10 a month, $25 a month or $1 a week. Payments can be made through PayPal below, or click here for information on recurring credit-card payments.

Thank you for your vital support.

Maestro, Mastercard, Visa, American Express, Discover, Debit

Reader Comments

Noozhawk is no longer accepting reader comments on our articles. Click here for the announcement. Readers are instead invited to submit letters to the editor by emailing them to [email protected]. Please provide your full name and community, as well as contact information for verification purposes only.

Daily Noozhawk

Subscribe to Noozhawk's A.M. Report, our free e-Bulletin sent out every day at 4:15 a.m. with Noozhawk's top stories, hand-picked by the editors.

Sign Up Now >