Таталцлын долгион хэмжигч төхөөрөмжийн толин тусгалын дулааны өөрчлөлтийг ердийн камер ашиглан хянах шинэ аргыг эрдэмтэд нээжээ.
LIGO буюу Лазерын интерферометрийн таталцлын долгионы ажиглалтын төв нь хар нүхний нэгдэл зэрэг сансрын хүчирхийлэлтэй үйл явдлуудаас үүсэх орон зайн долгионыг бүртгэдэг. Энэхүү хэмжилт нь протоны өргөнөөс ч бага хэмжээний хөдөлгөөнийг илрүүлэх шаардлагатай байдаг тул төхөөрөмжийн толин тусгалын тогтвортой байдал маш чухал юм. Температурын өчүүхэн өөрчлөлт хүртэл толин тусгалын шинж чанарыг алдагдуулж, сансрын дохиог бүртгэхэд саад учруулдаг байна.
“Classical and Quantum Gravity” сэтгүүлд нийтлэгдсэн судалгаагаар, худалдаанд байдаг ердийн камер ашиглан толин тусгалын гадаргуу дээрх дулааны тархалтыг ажиглах боломжтойг тогтоожээ. Ричардсоны удирдсан баг үүнийг автомашины хөдөлгүүрийн гаднах температурын өөрчлөлтийг хэмжих замаар дотоод үйл ажиллагааг нь таамаглахтай адилтгаж байна. Энэхүү арга нь шинэ тоног төхөөрөмж зохион бүтээх шаардлагагүйгээр төхөөрөмжийн дотоод асуудлыг оношлох боломжийг олгож буйгаараа онцлог юм.
Энэхүү шийдэл нь ирээдүйн таталцлын долгионы ажиглалтын төхөөрөмжүүдийн мэдрэг чанарыг сайжруулахад чухал ач холбогдолтой. Шинэ үеийн төхөөрөмжүүд нь өнөөгийнхөөс 10 дахин илүү мэдрэг байх зорилттой бөгөөд квант механикын дуу чимээг багасгах нь гол сорилт болж байна. Камер ашиглан толин тусгалын төлөв байдлыг илүү нарийвчлалтай хянах нь хар нүх болон нейтрон оддын судалгааг илүү өргөн хүрээнд хийхэд тус дөхөм болох юм.
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Researchers have discovered that an off-the-shelf camera could help improve the search for black hole collisions by revealing hidden problems inside gravitational wave detectors. The study, published in Classical and Quantum Gravity, presents a new approach for monitoring the tiny thermal patterns on LIGO’s mirrors without requiring new hardware development.
A New Way to Study the Mirrors Inside LIGO Detectors
The Laser Interferometer Gravitational-Wave Observatory (LIGO) has transformed astronomy by detecting ripples in spacetime created by some of the universe’s most violent events, including black hole mergers. Yet improving these detectors requires solving extremely difficult engineering problems because their measurements depend on detecting movements smaller than the width of a proton.
A team of researchers found that a commercially available camera could provide valuable information about the mirrors used in LIGO’s sensitive instruments. The technique allows scientists to observe temperature variations across the mirror surfaces and use those patterns to understand how heat-related effects could influence gravitational wave measurements.
The research, published in Classical and Quantum Gravity, focuses on improving the ability of next-generation gravitational wave observatories to reduce sources of noise that limit their performance. Instead of creating an entirely new monitoring system, researchers explored whether existing imaging technology could provide the necessary information.
Richardson explained the concept by comparing the process to examining a machine from the outside to understand what is happening internally.
“You can think of it like taking an infrared picture of a car engine,” Richardson said in the statement. “An engineer can look at the temperature pattern on the outside and infer what’s happening inside the engine. We’re doing the same thing with LIGO’s mirrors.”
An Unexpected Solution Using Existing Technology
The discovery stands out because many improvements in gravitational wave astronomy require advanced equipment, complex designs, and years of development. The camera-based method offers a different path by using accessible technology to collect information about one of the most sensitive instruments ever built.
The mirrors inside LIGO must remain exceptionally stable because even microscopic changes can affect the measurements used to detect gravitational waves. Temperature changes can alter the mirrors’ properties and create disturbances that make it harder to identify signals from distant cosmic events.
Image credit: Public domain/LIGO Hanford Observatory
By capturing thermal information, the camera system could help researchers identify patterns linked to these disturbances. Scientists could then develop better strategies to manage these effects and improve detector performance.
“It doesn’t require any new technology development, which is almost unheard of for solving a LIGO instrumentation problem,” Richardson said in a statement.
The approach could also help future gravitational wave observatories that aim to observe a wider range of cosmic events. More sensitive detectors may detect weaker signals, allowing astronomers to study black holes, neutron stars, and other extreme objects across greater distances.
Reducing Quantum Noise to Reach the Next generation of Detectors
Future gravitational wave observatories are designed to push beyond the capabilities of current facilities. Increasing sensitivity will require researchers to overcome several physical limitations, including noise created by quantum mechanical effects.
“The goal for the next generation of gravitational-wave detectors is to achieve about 10 times the sensitivity of today’s instruments,” Richardson said in the statement. “One of the key obstacles to achieving that is reducing the fundamental quantum mechanical noise that limits the precision of the measurements.”
The ability to better understand mirror behavior could become part of a broader effort to improve detector designs. As gravitational wave observatories become more advanced, scientists need increasingly precise methods to identify and control even the smallest sources of interference.
The camera technique does not replace the complex systems already used by LIGO, but it could provide researchers with an additional tool for diagnosing problems and improving future instruments. This type of practical innovation could help accelerate progress in gravitational wave astronomy.
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