Introducing the non-radiating antenna

Physics World

An international team of physicists has created what might seem like a contradiction in terms: a non-radiating source of electromagnetism. Maxwell’s equations tell us that accelerating charges radiate energy in the form of electromagnetic waves.

Terahertz radiation drives compact ultrafast electron diffractometer

Physics World

The team, led by Dongfang Zhang and Franz Kärtner at the Center for Free-Electron Laser Science in Hamburg, created their instrument by compressing bunches of electrons to ultra-short durations, using millimetre-wavelength terahertz radiation.

Insiders

Sign Up for our Newsletter

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Terahertz radiation is created using semiconductor surface states

Physics World

A highly efficient way to convert optical photons into terahertz radiation has been developed by researchers in the US and Germany. However, creating practical sources of terahertz radiation is challenging.

Novel brachytherapy device treats eye cancer with intensity-modulated radiation

Physics World

The device, designed by John Monro III, managing director of Montrose Technology Inc, and simulated by Medich’s research group, delivers a more conformal treatment to ocular tumours than conventional brachytherapy approaches.

Low-dose radiation plus immunotherapy can eliminate metastatic cancer in mice

Physics World

Targeted radionuclide therapy (TRT) can increase the effectiveness of immunotherapy, helping to eradicate metastatic cancer in mice even when the radiation dose is too low to destroy the cancer outright. 86 Y-NM600 uptake in mice with a single B78, NXS2 or 4T1 tumour (arrowheads).

Scanning the cosmos for signs of alien technology

Physics World

While neither idea was ever implemented, both were examples of a “technosignature” or a “technomarker” – a tell-tale indication of past or present technological activity, pointing out the existence of an advanced planetary civilization.

Reinforcing the case for independent QA in the radiation oncology clinic

Physics World

In radiation therapy, patient safety starts and ends with independent QA, a comprehensive programme of machine, patient-specific and workflow checks for identifying – and mitigating – human and system errors in an expanding universe of complex treatment variables.

Crisis in a lockdown: how NIST coped with a radiation leak

Physics World

On the morning of Wednesday 3 February 2021, the research reactor at the National Institute of Standards and Technology (NIST), just outside Washington, DC, was starting to come back online after routine maintenance. No indications of elevated radiation levels outside the building.”

Black-hole laser could have quantum computing applications

Physics World

An electromagnetic analogue for a black hole laser – a system that could theoretically amplify Hawking radiation from the event horizon of a black hole and make it observable – has been proposed by Haruna Katayama of Hiroshima University in Japan. Entangled radiation.

Proton arc therapy: do we need it; can we deliver it?

Physics World

Radiotherapy plays an essential role in the management of cancer, with roughly half of all cancer patients receiving radiation as part of their treatment. Radiation-therapy techniques.

Radiotherapy innovation: optimize the physics, but don’t ignore the biology

Physics World

I’d like to reflect on the relationship between the successes we’ve had with physics and technology – and the relative neglect of the biology – in radiation therapy.” By understanding the biological mechanisms, we have the roadmap of how we need the technology to operate.”.

X-ray guidance keeps cardiac radioablation on target

Physics World

With a single radiation treatment, a patient’s irregular heartbeat will be corrected; but there’s a catch. The technology required for real-time tracking of targets and organs-at-risk is available now, without the need for fancy, expensive equipment.

Infrared cloaking device could make objects invisible to thermal cameras

Physics World

D’oh: simulation of infrared radiation from a heat source being blocked by an object shaped like the head of Homer Simpson (left). This calculated radiation is re-emitted by the heat sources on the part of the ring facing the observer, which is a thermal camera.

Green jobs for physics graduates: opportunities to help build a sustainable future

Physics World

Effectively mitigating it will require a multifaceted approach that incorporates technological solutions as well as behaviour change at the governmental, corporate and individual levels. Hari Chohan , nuclear radiation analyst, UK Atomic Energy Authority.

Towards Auger therapy with iodine-infused nanoparticles

Physics World

Researchers at Kyoto University , the National Institutes for Quantum and Radiological Science and Technology ( QST ) and the University of California Irvine observed that tumour masses containing iodine-infused nanoparticles shrank when they were hit with single-energy X-rays.

Green jobs for physics graduates: decarbonizing energy sources

Physics World

Taking advantage of new technologies will be essential if the world is to achieve its net-zero goals. Hari Chohan , nuclear radiation analyst, UK Atomic Energy Authority. Hari Chohan is a nuclear radiation analyst, at the UK Atomic Energy Authority.

Tomography technique could help in the fight against nuclear terrorism

Physics World

Physicists at the Royal Institute of Technology in Stockholm, Sweden, have developed a new technique to rapidly detect and characterize so-called special nuclear materials like plutonium and enriched uranium.

Metal-organic frameworks stabilize perovskite LEDs

Physics World

The researchers tested their materials by exposing them to ultraviolet radiation, heat and an electrical field. As for applications, Tsai tells Physics World that as well as LEDs, the new PeMOF structures might come in useful as radiation scintillators for medical X-ray imaging. “We

Flexible X-ray detector constructed without harmful heavy metals

Physics World

Conventional radiation detectors for X-ray imaging – whether integrated into large, immobile instruments like CT scanners or the small bitewing detectors used by dentists – are typically fashioned into rigid panels.

Efficient optical rectenna could generate power from waste heat

Physics World

Rectennas (short for rectifying antennas) consist of two parts: an antenna, which absorbs electromagnetic radiation, and a diode, which converts the absorbed energy into direct current. If you can capture heat radiating into deep space, then you can get power anytime, anywhere,” he says.

Waste 101

ProKnow’s cloud-based architecture centralizes radiotherapy data while opening up user access

Physics World

In the short term, ProKnow can help the radiation oncology team create a unified framework for treatment planning, driving standardization and best practice across collaborating treatment facilities.

Astronomers capture most detailed images of large, rare metal asteroid

Physics World

The researchers also found that Psyche has a relatively high thermal inertia compared to other asteroids, yet it radiates approximately 60% less heat than would be expected for an object with such a high inertia.

2026 108

Physicists innovate to close the global radiotherapy gap

Physics World

Radiation therapy plays a vital role in the treatment of more than 50% of all cancer cases. In low- and middle-income countries, much of the population lacks access to radiation therapy. D/T, dosimetrist/therapist; P, physicist; RO, radiation oncologist; AI, artificial intelligence.

Independent QA: open access to data drives continuous improvement in radiotherapy

Physics World

How does independent QA benefit the radiation oncology care team? The clinical medical physicist owns the critical role of independent oversight of patient treatment in the radiation therapy suite. Right now, though, there are no regulations in the relevant technology standards (e.g.

Elekta Unity: when biological targeting meets adaptive radiotherapy

Physics World

The Elekta Unity MR-Linac is among a new generation of MR-guided radiotherapy (MR/RT) systems transforming patient care and treatment outcomes in the radiation oncology clinic. So what might BIGART look like in terms of a next-generation radiation oncology workflow?

How nuclear information has been hidden – and brought to light

Physics World

Could their immense toll of human suffering – an estimated 210,000 deaths, plus hundreds of thousands of survivors injured and sickened by radiation – have been avoided by warning Japan’s generals of the bomb’s power and demanding they surrender?

ASTRO convenes in-person conference for the cancer care community

Physics World

The American Society for Radiation Oncology (ASTRO) will once again welcome delegates to its annual meeting, which is due to take place in Chicago, IL, on 24–27 October 2021.

Solar radio waves could help monitor glacier thickness

Physics World

The alternative, proposed by radar engineer Sean Peters of the Massachusetts Institute of Technology (MIT) Lincoln Laboratory in the US and colleagues, instead uses naturally-occurring radio waves emitted by the Sun.

‘Magic angle’ device can rotate terahertz polarization by 90° or more

Physics World

A new device for rotating the polarization of terahertz radiation has been created by accident by researchers in the US. Controlling the polarization of electromagnetic radiation is crucial in numerous areas of science and technology.

The myQA SRS detector: clinical validation to clinical application in SRS/SBRT patient QA

Physics World

The myQA SRS is being billed as a “game-changer” when it comes to the complex task of verifying stereotactic treatment plans in the radiation oncology clinic – enhancing treatment quality, workflow efficiency and patient safety in the process.

Ghost surface polaritons seen for the first time

Physics World

Previously, hyperbolic polaritons, which arise from the strong coupling of electromagnetic radiation to lattice vibrations (phonons) in anisotropic crystals, had only been observed in two forms: bulk polaritons and surface polaritons.

Green jobs for physics graduates: policy and behaviour change

Physics World

Lo first became interested in this area while studying physics and astronomy at Durham University , UK, where her final-year project looked at how to calibrate telescopes to correct for atmospheric effects on the radiation they detect. They also look at how emerging technologies fit in.

LIGO mirrors have been cooled to near their quantum ground state

Physics World

Instead, during what LIGO member Evan Hall of the Massachusetts Institute of Technology (MIT) in the US describes as “some extra time with the instrument when LIGO was on but not actively taking data”, researchers implemented a feedback cooling protocol.

‘Magic angle’ device can rotate terahertz polarization by 90? or more

Physics World

A new device for rotating the polarization of terahertz radiation has been created by accident by researchers in the US. Controlling the polarization of electromagnetic radiation is crucial in numerous areas of science and technology.

Caution needed when testing Einstein’s general relativity using gravitational waves

Physics World

That theory, formulated a century earlier, predicts that massive, accelerating objects will generate wave-like distortions in space-time that radiate away from them.

Black holes merging with neutron stars have been spotted by LIGO–Virgo for the first time

Physics World

When gravitational waves are detected by LIGO–Virgo, a notice goes out to other astronomers who then train their telescopes on that region of the sky and look for electromagnetic radiation from the merger.

Why nuclear energy must be part of ‘net zero’ climate targets

Physics World

Indeed, it is understandable why people might fear radiation given that you can’t see it – yet the same can be said of the air that we breathe. Tricky problem Nuclear energy is often not viewed as a low-carbon energy source. Courtesy: Shutterstock/andrea dantee).

Microwave imaging could provide safer, more comfortable breast cancer screening

Physics World

Microwave breast imaging (MBI) represents a promising non-invasive technology for detection of breast tumours. It does not utilize ionizing radiation nor require breast compression, potentially offering a safer and more comfortable method for breast cancer screening.

A focus on cutting-edge medical physics research

Physics World

In the area of radiation therapy, for example, several of the most influential papers on the development of intensity-modulated radiotherapy were published in PMB. In radiotherapy, we see new frontiers under exploration such as FLASH irradiation and micro/minibeam technologies.

CMOS controller for quantum computer operates at 3 K

Physics World

Researchers are developing quantum computers using several different technologies and it is not yet clear which current technology – if any – will lead to the creation of low-cost, scalable devices. Long-established technology.