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Chinese Satellite Searches for Invisible Dark Matter but also Explores Origin of Cosmic Rays

This was the first time that an experiment directly measures the cosmic ray protons up to the energy of 100 TeV with high precision

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An international research team has conducted a precise measurement of the spectrum of protons, the most abundant component of cosmic rays, in an energy range from 40 GeV to 100 TeV. Pixabay

A Chinese satellite, named ‘Monkey King’, has not only searched for the invisible dark matter but also explored the origin of cosmic rays or high energy particles that travel through space at nearly the speed of light.

An international research team has conducted a precise measurement of the spectrum of protons, the most abundant component of cosmic rays, in an energy range from 40 GeV to 100 TeV (one TeV is one trillion electron volts) with China’s Dark Matter Particle Explorer (DAMPE), also known as ‘Wukong’ or Monkey King, Xinhua news agency reported.

This was the first time that an experiment directly measures the cosmic ray protons up to the energy of 100 TeV with high precision, according to the research team.

The measured spectrum shows that the proton flux increases at hundreds of billions electron volts and then drops at around 14 TeV, indicating the existence of a new spectral feature of cosmic rays, said Chang Jin, the principal investigator of DAMPE and the director of the Purple Mountain Observatory (PMO) of the Chinese Academy of Sciences.

Chinese, Satellite, Invisible
A Chinese satellite, named ‘Monkey King’, has not only searched for the invisible dark matter but also explored the origin of cosmic rays or high energy particles that travel through space. Pixabay

“The new finding is of great importance in helping scientists understand the source and acceleration of cosmic rays in the Milky Way,” said Yuan Qiang, a researcher at PMO.

“We speculate that the newly discovered spectral feature of cosmic ray protons might be produced by a nearby source which is a few thousand light-years from the earth,” Yuan said.

Another possibility is that there are different types of sources of cosmic rays in the Milky Way, which generate different spectra, Yuan added.

“We still don’t know what kind of celestial body generates those cosmic rays of and from which direction they come. Many scientists believe that the majority of galactic cosmic rays come from supernova remnants. We need more observation with various methods to answer the questions related to the origin and acceleration mechanism of cosmic rays,” said Yue Chuan, another researcher at PMO.

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The result, based on DAMPE’s data collected in its first two and a half years, was published online in the latest issue of Science Advances. (IANS)

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Performance of Chinese Economy ‘Noteworthy’ in Last Four Decades and Holds Key Lessons for India

Over the nineteenth century, the two countries had been following the opposite trajectory

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In fact, China was at a disadvantage on some aspects of development. Pixabay

China celebrated the 70th anniversary of becoming a communist republic with much fanfare. Back in October 1949, when China was adopting the communist model of societal organisation, India was framing its constitution. Less than four months later, India was a democratic republic. The two nations in their current identities were, thus, born out of the ashes of the colonial world around the same time but adopted a contrasting system of economic and social development. After seventy years, the two nations stand at very different levels of development in terms of their economic, military and technological progress. China’s prowess on these fronts is incomparable to that of India.

China’s rise is quite extraordinary from the Indian viewpoint as the two nations were at par with each other in 1950. In fact, China was at a disadvantage on some aspects of development. Over the nineteenth century, the two countries had been following the opposite trajectory. As per Maddison estimates, India’s per capita income grew from $533 in 1820 to $673 in 1913 (in 1990 dollars). During the same period, China’s per capita income declined from $600 to $552. In the first half of the twentieth century, the per capita incomes of both nations declined. Between 1913 and 1950, India’s per capita income declined from $673 to $619 while China’s per capita income declined from $552 to $439. Thus, in 1950 when India became a republic, it was ahead of China in economic terms.

Even as recently as 1978, the per capita GDP of China was $979, and India was $966. The excesses of Mao’s rule that culminated in the disastrous programmes of the Great Leap Forward and the Cultural Revolution kept economic progress of China subdued in the first three decades. However, all that changed with the coming of Deng Xiaoping in 1978. As a result, China’s per capita income today is about 4.6 times than that of India. Despite all the demerits of the authoritarian rule in China, the performance of the Chinese economy in just the last four decades is noteworthy and holds key lessons for India as well.

The first, and probably the most important thing that China did well right from the start was its focus on human development. Even under Mao, China’s emphasis on education for all and the healthcare facilities provided by its communes helped the country perform well on human development. While the human development index (HDI) was introduced in 1990, its long run calculations have been provided by Nicholas Crafts. The HDI numbers for China and India are, thus, available for 1950 and 1973. While both the countries had almost similar HDI scores in 1950 (0.163 and 0.160 respectively), Chinaa¿s score was markedly higher in 1973 (0.407 against India’s 0.289).

Chinese, Economy, India
China’s rise is quite extraordinary from the Indian viewpoint as the two nations were at par with each other in 1950. Pixabay

So, the improvement in human development poised the society perfectly for the reforms that would be imposed under Deng’s China. The development of a vast pool of human capital primed the economy for economic reforms and, therefore, allowed the country to maximise its gains form it. On the other hand, education and health have always been an area for concern for India. By the time India began undertaking economic reforms in the early 1980s, India’s health and education levels were still poor. An average Indian died at the age of 54 in 1980 while merely 43.6 percent of its population was literate. By comparison, life expectancy in China was 64 years and its literacy rate was 66 percent around the same time.

The second key difference was the focus on the type of industries by the two countries. China focussed on industries that were more labour-intensive leveraging on its pool of cheap labour. Industries like textile, light engineering and electronics received higher investment. China also introduced special economic zones (SEZs) as early as 1980, which pushed manufacturing growth and setting up of export-oriented industries. India, on the other hand, focused more on heavy industries that were capital-intensive and employed less labour. Moreover, the policy focus on attracting foreign investment through instruments like SEZ came much later. As a result, by 1998 China had FDI investments of $183 per capita as per Maddison estimates and India was merely at $14.

As India hardly pushed for labour-intensive manufacturing growth, the sector never picked up and the country became a services-led economy. China, on the other hand, became the manufacturing powerhouse of the world. A similar edge is being created by Bangladesh in recent times. The export-industries that are moving out of China due to rise in labour costs and the trade war with the United States are being effectively captured by countries like Bangladesh. The country has eclipsed India’s growth rate since 2017 and has become the fastest-growing country in South Asia. Most of its growth is being led by its manufacturing sector, which implies that the country will be able to create high employment for its citizens and improve their standard of living at a higher and more equitable rate than India; exactly what China has achieved over the last four decades.

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Thus, India has a lot to learn from the development trajectories of its neighbours. The focus on health and education parameters for long-term growth and market-oriented policies in the short term has been an effective strategy for Asian countries. Perhaps it is time that India does the same. (IANS)