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| Liu Xiabao |
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| Tiananmen Square Massacre |
My Scribbles in the Sands of Time...
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| Liu Xiabao |
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| Tiananmen Square Massacre |
Schematic of Neutrino observatory under Bodi West Hills
The neutrino was proposed by Wolfgang Pauli in 1930, but it took 26 years to detect it experimentally. In 1956, Frederick Reines and Clyde Cowan found evidence of neutrino interactions by monitoring a volume of cadmium chloride with scintillating liquid near to a nuclear reactor. Reines was jointly awarded the Nobel prize in Physics in 1995 for this work. There are three types of neutrinos, named electron-neutrino, tau-neutrino and muon-neutrino. They are denoted by the greek letter v (nu) and are affected only by the ‘weak nuclear force’, one of the four fundamental forces in nature. Raymond Davis Jr. and Masatoshi Koshiba were jointly awarded the 2002 Nobel Prize in Physics; Davis for his pioneer work on cosmic neutrinos and Koshiba for the first real time observation of supernova neutrinos. The detection of solar neutrinos, and of neutrinos of the SN 1987A supernova in 1987 marked the beginning of neutrino astronomy of which the INO to be installed in India is a part of. The detection and study of these tiny particles assumes significance when we consider the fact that even though possessing a very small mass, the enormous number of them makes the total mass a prominent place in the study of the evolution of the universe.
Detection of neutrinos is one of the most technically challenging activities in science. Because they are very weakly interacting, detectors must be very large to detect a significant number of them. They are often built underground in order to isolate the detector from cosmic rays and other background radiation. The overburden provided by the earth matter is transparent to neutrinos whereas most background from cosmic rays is substantially reduced due to their absorption by the earth. The INO will be built in a cavern set in massive charnockite rock (group of igneous rocks found in South India with those in Tamil Nadu known to be the hardest). The cavern will be excavated by drilling a tunnel of 2 km in length under the peak designated as 1589 so that there is vertical overburden of about 1300 m. The minimum vertical cover required is 1000 m to filter out unwanted radiation. The actual site is 2 km from Pudukkottai, 14 km from Bodi and 110 km from Madurai.
Location of the observatory which will be beneath the peak
The primary research instrument will consist of a 50,000 kg magnetized iron particle physics calorimeter with glass Resistive Plate Chamber (RPC) technology as the sensor elements. A prototype of the INO detector with 14 layers, measuring 1m x 1m x 1m is already operational in the VECC, Kolkata. The 35 ton prototype is set up over ground to track cosmic muons. In 2008, INO started a graduate training program leading to Ph.D. Degree in High Energy Physics and Astronomy to deal with the shortage of particle physicists. The Primary goals of the INO are the following.
The INO includes nearly 90 scientists from 25 institutions, with the Tata Institute of Fundamental Research (TIFR) as the nodal institution. The construction is expected to start in 2011 and the first module of the detector will start taking data by 2016. Immediately after that, the subsequent modules will be constructed. The present cost estimate is Rs. 1200 crores (US $ 273 m), including Rs. 950 crores (US $ 216 m) for the facility and the remaining for providing infrastructure arrangements.
There are four major neutrino detecting laboratories in the world: Sudbury in Canada, Soudan mines in the USA, Kamioka in Japan and under the Gran Sasso mountains in Italy. The first two are located in mines and house relatively much smaller detectors than the other labs that are accessed by a road tunnel. One of the earliest laboratories created to detect neutrinos underground in the world was located more than 2000 m deep at the Kolar Gold Field mines in India. The first atmospheric neutrinos were detected in this facility in 1965. The lab was closed due to the closure of the mines. So, India is very much experienced in this field.
With such a state-of-the-art subatomic lab, India can confidently step into the high-energy nuclear research arena dominated by CERN. It’s high time that India build a particle accelerator comparable to the Large Hadron Collider and put Indian science at the forefront of world science. We can hope that this INO will be the first confident step India makes in scientific world after a long time of hibernation.
October 13, 2010 was just an ordinary day for most people, but for the 33 miners who were trapped inside the San Jose gold and copper mine in Chile, it was the day of deliverance, when they awoke from a nightmare which lasted 68 days. On Aug 5, a mine shaft caved in 300 metres below, blocking the escape route of the people working down under. New cave-ins in the following days made the rescue effort difficult. 17 days later, a drill probe reached the emergency shelter area 624 metres below, to which the miners attached a hand-written note saying that "All 33 of us are well inside the shelter." Once contact was established, food and life support systems reached them and they were kept on tenterhooks as the rescue effort was first estimated to be a long drawn-out one which threatened to go until Christmas. Chile stood solid behind the rescue efforts and experts from about a dozen countries were called in to support the effort. NASA's help to keep up the morale of the people trapped in humid and lone conditions truly helped.
h video conferencing and enjoy Chile's soccer match. A powerful drill started on Sep 19 and reached the miners on Oct 9, ending the stalemate. Four days later, all of them were rescued using a capsule named Phoenix. Luis Urzua, who was the shift boss emerged last on the line, creating a Guiness record for the longest underground stay.
ial day for India. From the morning itself, anticipation and a bit of anxiety was in the air. As people moved about their daily lives more or less normally, the question spontaneously popped up when people met together was this, “What would be the outcome of Ayodhya verdict today?”. Yes, the nation awaited the decision of the Lucknow Bench of Allahabad Highcourt with bated breath.Ayodhya was a political and religious hotspot for centuries. Ever since Babar, the first Mughal emperor destroyed the temple of Ramjanmasthan at Ayodhya and constructed a mosque there in 1528, the location was coveted by both parties. Regular H
indu worship started in 1949 as the building was virtually left vacant by the Muslims, without any form of Islamic worship. Ayodhya assumed ominous proportions in the 80s when the then Prime Minister Rajiv Gandhi allowed the laying of stone (shilanyas) for a new temple there. Communal passions ignited both parties to take a hostile view of each other. Massive construction movements spearheaded by the Hindu organisations succeeded in 1992 to tear down the disputed structure and erect a make-shift temple. Large scale communal violence erupted at several places in North India in the wake of the demolition, laying waste the lives of hundreds of innocent people of both religions.
The government led by Prime Minister Narasimha Rao awoke with a start from the complacent slumber and took stern action. It dissolved the Uttar Pradesh assembly led by the BJP and banned its sister outfit, the RSS. The onus of deciding on the fate of title suits of the disputed site came on the shoulders of the Lucknow Bench of the Allahabad Highcourt. After decades of legal ramblings, the court came out with the final verdict today.
The Bench, consisting of Justices Sibghat Ullah Khan, Sudhir Agarwal and Dharam Veer Sharma ruled on their majority verdict the following points.
Well, the legal battle is over and the judgement is out. It is clear that the verdict doesn’t please both sides. This itself is an indication of the impartiality of the judges. The Hindu Maha Sabha declared that they are not happy with the decision and the Sunni Wakf Board said they were disappointed with it. Perhaps, this may be the ideal outcome a secular country can hope for! Neither party came out as the sole victor. We should not dwell too much on the past and the court simply couldn’t have put the clock back by ordering a reconstruction of the disputed structure. India should start from here and make the court’s order a shining piece of adoration in its onward march towards the goals of harmony and brotherhood.