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Jan
31
answered What would happen if two electrons fuse?
Jan
30
comment Switching a PMT from PC-mode to DC-mode: What happens?
what is the 'coupling' setting at the scope input ?
Jan
30
comment Switching a PMT from PC-mode to DC-mode: What happens?
sounds like something cuts off the DC component in your signal. Just a thought: does your PMT amplifier support DC mode ? (can you share which model it is ?)
Jan
29
comment Switching a PMT from PC-mode to DC-mode: What happens?
have you actually observed what happens when you increase the photon rate (be careful to stay within the limits of your PMT) ? If you have a high rate, pulses from individual photons will 'overlap' and look like a steady current (as illustrated e.g. here: vertilon.com/pmt_readout.html )
Jan
28
comment Are we living in a Universe with 3 time dimensions and 1 spatial dimension?
I guess it would be difficult to read your question if he had one spatial dimension only...
Jan
24
answered Which collision energy at LHC is better for hunting 125 GeV Higgs, 7 TeV, 8 TeV or 14 TeV?
Dec
22
answered Is it possible to single out a proton, electron, neutron?
Dec
20
comment The status of the BICEP2 'discovery' after Planck 2014
see also resonaances.blogspot.com/2014/09/… and links therein
Dec
4
comment What would happen if you put your hand in front of the 7 TeV beam at LHC?
the reflex time of 0.1-0.2 seconds is much larger than the time it takes for the beam to do one turn (which is about $90 \mu s$), once protons interact with the hand, most of them will not make another turn (the beam blows up in the transverse direction), i.e. the reaction time is slow enough to absorb one beam entirely. $1.2 \cdot 10^{11}$ is more the number of protons per bunch, of which there are up to 2808 per beam (see here which would give $3.4 \cdot 10^{14}$ protons per beam.
Dec
4
comment What would happen if you put your hand in front of the 7 TeV beam at LHC?
The design number of bunches is 2808 per beam (see here and $1.15\cdot 10^{11}$ protons per bunch ($3.2 \cdot 10^{14}$ protons per beam), you'll get 362 MJ per beam (at 7 TeV beam energy)
Nov
29
awarded  Yearling
Nov
28
comment What role did the Higgs boson play in the Big Bang?
see the Wikipedia article on the Inflaton, which is a general term for a scalar field which drives inflation. The Higgs field is a scalar field and could be the Inflaton (i.e. drive inflation).
Nov
18
revised How does a magnetic monopole break time reversal symmetry?
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Nov
18
revised How does a magnetic monopole break time reversal symmetry?
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Nov
18
answered How does a magnetic monopole break time reversal symmetry?
Nov
7
comment Unitarity of PMNS matrix
if any row or column squared sums to something less than one (experimentally), this is an indication that we're missing something, e.g. a fourth row/column corresponding to an additional species of neutrinos.
Nov
6
comment Software for calculating Feynman Diagrams
MadGraph does only tree level (no loops but many outgoing particles), MadGraph5_aMC@NLO can do one loop
Nov
5
comment Kitchen floor dries faster with lights on?
although traditional incandescent light bulbs and fluorescent tube lights have an efficiency far below 50% (according to en.wikipedia.org/wiki/Fluorescent_lamp#Luminous_efficacy), so more energy is converted to heat than to light for these.
Nov
1
comment Kitchen floor dries faster with lights on?
yes, good point, and the water in turn would heat the region of air immediately above the water
Nov
1
revised Kitchen floor dries faster with lights on?
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