Re: Early Morning Phenomenon Results

[Chris Alston <alstonc@odrge.odr.georgetown.edu>]

>Date:         Wed, 13 May 1998 07:14:35 EDT
>Reply-To: Medical Physics Mailing List <MEDPHYS@LISTS.WAYNE.EDU>
>Sender: Medical Physics Listserver <medphys@lists.wayne.edu>
>From: McComasVan <McComasVan@AOL.COM>
>Subject:      Re: Early Morning Phenomenon Results
>To: Multiple recipients of list MEDPHYS <MEDPHYS@LISTS.WAYNE.EDU>
>
>Thanks for all the insight on the phenomenon. Here is a little more
>information to digest:
>
>1. Both machine are on timers and they are turned on at 4 a.m. I arrive at 6
>a.m. to start measurements. Both machines will have 800 MU of 6 MeV electrons
>run to warm-up the wave guide.
>
>2. The solid phantoms and chamber are kept in the room so they are at room
>temp. at the time of the measurements.
>
>3. This week there as been a large change in the weather. The results of
>pressure and output for electrons may help. The results are:
>
>              Pressure     Output      Pressure    Output      Pressure
>Output
>6 MeV:  1008 mB    0.987         1012 mB       0.992        1022 mB    1.004
>
>9 MeV    1008 mB    0.988         1012 mB      0.992         1022 mB    1.004
>
>12 MeV   1008 mB   0.988         1012 mB      0.988         1022 mB     1.000
>
>15 MeV    1008 mB   0.988          1012 mB    0.993          1022 mB     1.000
>
>18 MeV    1008 mB    0.984         1012 mB    0.993            1022 mB
>1.000
>
>21 MeV     1008 mB    0.988         1012 mB   0.993            1022 mB
>1.000
>
>
>Van H. McComas, MS
>Senior Medical Physicist
>Riverside Regional Medical Center
>
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