About plasma temperature?

There are many definitions about plasma temperature, like electron temperature, ionization temperature, excitation temperature, atomic temperature, ionic temperature... What do they mean? I am...

31 December 2018 5,235 2 View

How to assemble micrometer-sized metallic particles on glass surface?

Hi everyone, I want to put some metallic particles with micrometer-sized (

08 September 2017 5,216 4 View

How to understand the physical image of polaron?

How to understand the physical image of polaron? I have searched it in wiki, but the concept is still hard to understand. Could anyone use some simple and easy to understand words to explain it?...

03 April 2017 9,408 4 View

What is the physical meaning of accuracy of the step motor?

I use a step motor-based x-y microscope stage. I notice the paprameters in the datasheet include repeatability, accuracy and step size. Let the physical location to be X, so I understand the step...

03 April 2017 4,972 0 View

How to get a high conversion effiency when using the BBO crystal for a 800nm fs laser (SHG process)?

I want to get 400nm from the 800nm laser using the BBO crystal, however, the conversion efficiency is quite low. In my case, the 800 nm pulse is with the rep. rate of 80MHz and average power of...

02 March 2017 5,886 20 View

Any textbook about scientific instrument design?

01 February 2017 7,271 2 View

In what case can the plasma be treated as the ideal gas?

In what case can the plasma be treated as the ideal gas? The plasma, more specifically, is induced during a laser ablation event.

10 November 2016 9,130 3 View

What is the bandgap of PbWO4?

what is the bandgap of PbWO4?

05 June 2016 1,621 3 View

What is coulombic screening?

what is coulombic screening? Any reference? Thanks!

10 November 2015 4,184 1 View

How to accurately measure a laser beam with a radius less than 1 micrometer (um)?

how to accurately measure a laser beam with a radius less than 1 micrometer (um)?

07 August 2015 662 0 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View