T1 and T2 measurements

[Diamond Jim]

Hi all,


As some of you know, I have been setting up some equipment to


measure the T1and T2 times for some common liquids. They are both


easy to measure if you have a large sensor with lots of turns.


Anyway ... my results so far. For T2


distilled, de-oxygenated water 2.5 seconds


tap water 1.43 seconds


kerosene 1.06 seconds


T1 is harder to measure accurately and I only have the figure


for kerosene - it is close to 1 second (+/- 10% or so).


I post this because the time for kerosene is twice what I


expected it to be. In the literature, I have always seen a figure


of about 1/2 second. I measure twice that!


My measurements will continue - I'm going to try diesel fuel


which ought to be similar to kerosene since it is mostly kerosene.


I'll try any liqid anyone would like to suggest - the caveat is that


it shouldn't dissolve PVC since that is what my form is constructed


from.


By the way, I now have some nice digital recordings (.WAV files)


for the proton signal here. If anyone would like to hear one, send


me some mail and I'll send one to you attached to Email. The file


is rather large to send 'attach'd to this mail which goes to this


whole list.


Jim

[Keith Bar]

RE: T1 and T2 measurements

Jim:


I'd love to hear what you've got.


Please send the wav files.


Thanks,


Keith


-----Original Message-----


From: Diamond Jim [mailto:[email protected]]


Sent: Friday, March 09, 2001 6:19 PM


To: The Proton Mag Forum


Subject: T1 and T2 measurements


Hi all,


As some of you know, I have been setting up some equipment to


measure the T1and T2 times for some common liquids. They are both


easy to measure if you have a large sensor with lots of turns.


Anyway ... my results so far. For T2


distilled, de-oxygenated water 2.5 seconds


tap water 1.43 seconds


kerosene 1.06 seconds


T1 is harder to measure accurately and I only have the figure


for kerosene - it is close to 1 second (+/- 10% or so).


I post this because the time for kerosene is twice what I


expected it to be. In the literature, I have always seen a figure


of about 1/2 second. I measure twice that!


My measurements will continue - I'm going to try diesel fuel


which ought to be similar to kerosene since it is mostly kerosene.


I'll try any liqid anyone would like to suggest - the caveat is


that it shouldn't dissolve PVC since that is what my form is


constructed from.


By the way, I now have some nice digital recordings (.WAV


files) for the proton signal here. If anyone would like to hear


one, send me some mail and I'll send one to you attached to Email.


The file is rather large to send 'attach'd to this mail which


goes to this whole list.


Jim

[Diamond Jim]

Re: T1 and T2 measurements

----- Original Message -----


From: Keith Barr


To: 'The Proton Mag Forum'


Sent: Saturday, March 10, 2001 12:18 PM


Subject: RE: T1 and T2 measurements


Jim:


I'd love to hear what you've got.


Please send the wav files.


Thanks,


Keith


-----Original Message-----


From: Diamond Jim [mailto:[email protected]]


Sent: Friday, March 09, 2001 6:19 PM


To: The Proton Mag Forum


Subject: T1 and T2 measurements


Hi all,


As some of you know, I have been setting up some equipment


to measure the T1and T2 times for some common liquids. They are


both easy to measure if you have a large sensor with lots of


turns.


Anyway ... my results so far. For T2


distilled, de-oxygenated water 2.5 seconds


tap water 1.43 seconds


kerosene 1.06 seconds


T1 is harder to measure accurately and I only have the


figure for kerosene - it is close to 1 second (+/- 10% or so).


I post this because the time for kerosene is twice what I


expected it to be. In the literature, I have always seen a


figure of about 1/2 second. I measure twice that!


My measurements will continue - I'm going to try diesel fuel


which ought to be similar to kerosene since it is mostly


kerosene. I'll try any liqid anyone would like to suggest - the


caveat is that it shouldn't dissolve PVC since that is what my


form is constructed from.


By the way, I now have some nice digital recordings (.WAV


files) for the proton signal here. If anyone would like to hear


one, send me some mail and I'll send one to you attached to


Email. The file is rather large to send 'attach'd to this mail


which goes to this whole list.


Jim

[Your Name Here]

RE: T1 and T2 measurements

Jim:


I'm just starting to think about building a Proton Mag. I would like


any T1 T2 times you have. What sample gives the best SNR?


Please send me the wav files. I'd love to listen. This is all new to


me.


Frank


-----Original Message-----


From: Diamond Jim [mailto:[email protected]]


Sent: Friday, March 09, 2001 9:19 PM


To: The Proton Mag Forum


Subject: T1 and T2 measurements


Hi all,


As some of you know, I have been setting up some equipment to


measure the T1and T2 times for some common liquids. They are both


easy to measure if you have a large sensor with lots of turns.


Anyway ... my results so far. For T2


distilled, de-oxygenated water 2.5 seconds


tap water 1.43 seconds


kerosene 1.06 seconds


T1 is harder to measure accurately and I only have the figure


for kerosene - it is close to 1 second (+/- 10% or so).


I post this because the time for kerosene is twice what I


expected it to be. In the literature, I have always seen a figure


of about 1/2 second. I measure twice that!


My measurements will continue - I'm going to try diesel fuel


which ought to be similar to kerosene since it is mostly kerosene.


I'll try any liqid anyone would like to suggest - the caveat is


that it shouldn't dissolve PVC since that is what my form is


constructed from.


By the way, I now have some nice digital recordings (.WAV


files) for the proton signal here. If anyone would like to hear


one, send me some mail and I'll send one to you attached to Email.


The file is rather large to send 'attach'd to this mail which


goes to this whole list.


Jim

[Lee Wiltshire]

Re: T1 and T2 measurements

I'd be interested in the wav files too. Currently building a soil resistivity


meter - then onto a Proton Mag... (Not for work, btw)


Regards,


//Lee


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Lee S. Wiltshire


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>>> [email protected] 03/10/01 02:19am >>>


The Proton Mag Forum


--snip--


By the way, I now have some nice digital recordings (.WAV files) for the


proton signal here. If anyone would like to hear one, send me some mail and


I'll send one to you attached to Email. The file is rather large to send


'attach'd to this mail which goes to this whole list.


Jim


--snip--


WSI specialises in the design, development and manufacture of


high performance linear RF components and sub-systems, with a


particular focus on wideband linear base station power amplifiers


for the next generation of mobile phone standards, including GSM


EDGE and UMTS. ISO9001 and ISO14001 registered


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